diff --git a/Makefile b/Makefile
index b160df8..7770c71 100644
--- a/Makefile
+++ b/Makefile
@@ -56,7 +56,7 @@ RSF             := $(TOPDIR)/$(RESOURCES)/template.rsf
 # options for code generation
 #---------------------------------------------------------------------------------
 ARCH        := -march=armv6k -mtune=mpcore -mfloat-abi=hard -mtp=soft
-COMMON      := -Wall -O2 -mword-relocations -fomit-frame-pointer -ffunction-sections $(ARCH) $(INCLUDE) -D__3DS__
+COMMON      := -Wall -O2 -mword-relocations -fomit-frame-pointer -ffunction-sections $(ARCH) $(INCLUDE) -D__3DS__ $(FLAGS)
 CFLAGS      := $(COMMON) -std=gnu99
 CXXFLAGS    := $(COMMON) -fno-rtti -fno-exceptions -std=gnu++11
 ASFLAGS     := $(ARCH)
@@ -343,3 +343,27 @@ endef
 #---------------------------------------------------------------------------------------
 endif
 #---------------------------------------------------------------------------------------
+
+# Added by Zy
+# To check if the headers are protected and if they include everything they need.
+check_headers :
+	@ERROR=0; \
+	for HEADER in $(wildcard *.h) $(wildcard **/*.h) $(wildcard *.hpp) $(wildcard **/*.hpp); \
+	do \
+		echo "check header $$HEADER..."; \
+		> __tmp_check_header.cpp echo "#include \"$$HEADER\""; \
+		>> __tmp_check_header.cpp echo "#include \"$$HEADER\""; \
+		>> __tmp_check_header.cpp echo "int main(void) {}"; \
+		$(CPP) $(INCLUDE) $(COMMON) $(LIBS) -o __tmp_check_header.out -c __tmp_check_header.cpp; \
+		if [ $$? -ne 0 ]; \
+		then \
+			ERROR=1; \
+			/bin/echo "  ### error :( ###"; \
+		else \
+			/bin/echo "  ### good :) ###"; \
+		fi; \
+		2> /dev/null rm -- "__tmp_check_header.out" "__tmp_check_header.c"; \
+	done; \
+	if [ $$ERROR -eq 0 ]; then true; else false; fi;
+
+.PHONY : check_headers
diff --git a/dev/norm.sh b/dev/norm.sh
new file mode 100755
index 0000000..95e39dd
--- /dev/null
+++ b/dev/norm.sh
@@ -0,0 +1,19 @@
+#!/bin/sh
+
+# Use the norminette but without all these rules that make coding harder.
+
+norminette | grep -v \
+"INVALID_HEADER
+VAR_DECL_START_FUNC
+EMPTY_LINE_FUNCTION
+TOO_MANY_ARGS
+TOO_MANY_FUNCS
+TOO_MANY_LINES
+PREPROC_CONSTANT
+MACRO_FUNC_FORBIDDEN
+GLOBAL_VAR_DETECTED
+WRONG_SCOPE_COMMENT
+MULT_DECL_LINE
+GOTO_FBIDDEN
+LABEL_FBIDDEN
+TERNARY_FBIDDEN"
diff --git a/include/mlx.h b/include/mlx.h
index 220a7be..dde4bf4 100644
--- a/include/mlx.h
+++ b/include/mlx.h
@@ -33,7 +33,6 @@
 #ifndef MLX_H
 # define MLX_H
 
-# include "mlx3ds_3dskey.h"
 # include "mlx3ds_typealiases.h"
 # include "mlx_init.h"
 # include "mlx_window.h"
diff --git a/include/mlx3ds_3dskey.h b/include/mlx3ds_3dskey.h
deleted file mode 100644
index ce85936..0000000
--- a/include/mlx3ds_3dskey.h
+++ /dev/null
@@ -1,95 +0,0 @@
-/**
- * mlx3ds_3dskey.h
- *   for the project "MinilibX for 3DS"
- *   by Zy
- *   at https://github.com/frzysk/mlx3ds
- */
-
-/**
- * Enum of all the keys of the 3ds.
- * 
- * These are the same constants defined in hid.h from devkitPro,
- * but with documentation that basically repeat what the name
- * of the constants already say.
- */
-
-#ifndef MLX3DS_3DSKEY_H
-# define MLX3DS_3DSKEY_H
-
-# define BIT(n) 1U << n
-
-/// @brief Represents a key of the 3DS.
-typedef enum e_3dskey
-{
-	/* BUTTONS */
-
-	/// @brief A button
-	KEY_A = BIT(0),
-	/// @brief B button
-	KEY_B = BIT(1),
-	/// @brief X button
-	KEY_X = BIT(10),
-	/// @brief Y button
-	KEY_Y = BIT(11),
-	/// @brief Select button
-	KEY_SELECT = BIT(2),
-	/// @brief Start button
-	KEY_START = BIT(3),
-	/// @brief R button
-	KEY_R = BIT(8),
-	/// @brief L button
-	KEY_L = BIT(9),
-
-	/* DIRECTIONS */
-
-	/// @brief D-Pad Right
-	KEY_DRIGHT = BIT(4),
-	/// @brief D-Pad Left
-	KEY_DLEFT = BIT(5),
-	/// @brief D-Pad Up
-	KEY_DUP = BIT(6),
-	/// @brief D-Pad Down
-	KEY_DDOWN = BIT(7),
-	/// @brief C-Pad Right
-	KEY_CPAD_RIGHT= BIT(28),
-	/// @brief C-Pad Left
-	KEY_CPAD_LEFT = BIT(29),
-	/// @brief C-Pad Up
-	KEY_CPAD_UP = BIT(30),
-	/// @brief C-Pad Down
-	KEY_CPAD_DOWN = BIT(31),
-
-	/* TOUCH */
-
-	// ??? unsure what KEY_TOUCH is... TODO
-	KEY_TOUCH = BIT(20),
-
-	/* New 3DS */
-
-	/// @brief C-Stick Right (only for New 3DS)
-	KEY_CSTICK_RIGHT = BIT(24),
-	/// @brief C-Stick Left (only for New 3DS)
-	KEY_CSTICK_LEFT = BIT(25),
-	/// @brief C-Stick Up (only for New 3DS)
-	KEY_CSTICK_UP = BIT(26),
-	/// @brief C-Stick Down (only for New 3DS)
-	KEY_CSTICK_DOWN = BIT(27),
-	/// @brief ZL button (only for New 3DS)
-	KEY_ZL = BIT(14),
-	/// @brief ZR button (only for New 3DS)
-	KEY_ZR = BIT(15),
-
-	// TODO implement catch-all directions?
-	/*
-	// ???
-	KEY_UP    = KEY_DUP    | KEY_CPAD_UP,    ///< D-Pad Up or Circle Pad Up
-	// ???
-	KEY_DOWN  = KEY_DDOWN  | KEY_CPAD_DOWN,  ///< D-Pad Down or Circle Pad Down
-	// ???
-	KEY_LEFT  = KEY_DLEFT  | KEY_CPAD_LEFT,  ///< D-Pad Left or Circle Pad Left
-	// ???
-	KEY_RIGHT = KEY_DRIGHT | KEY_CPAD_RIGHT, ///< D-Pad Right or Circle PadRight
-	*/
-}	t_3dskey;
-
-#endif
\ No newline at end of file
diff --git a/include/mlx_hook.h b/include/mlx_hook.h
index a449268..847eda9 100644
--- a/include/mlx_hook.h
+++ b/include/mlx_hook.h
@@ -27,7 +27,6 @@
 # define MLX_HOOK_H
 
 # include "mlx3ds_typealiases.h"
-# include "mlx3ds_3dskey.h"
 
 /// @brief Doesn't do anything, the 3DS doesn't have a mouse.
 ///
@@ -43,14 +42,14 @@ int		_mlx_mouse_hook(t_win win_ptr, int (*funct_ptr)(), void *param);
 /// @param win_ptr Window to affect.
 /// @param funct_ptr Function to call when the event occurs. `keycode` is the
 ///                  key pressed (note that they are obviously different than
-///                  the keyboard ones, see 'mlx3ds_3ds_key.h')).
+///                  the keyboard ones, use the KEY_* constants from hid.h)).
 ///                  (TODO what was the name of the key constants use with mlx?)
 ///                  `param` is set as the address given to mlx_key_hook().
 ///                  The return value is unused.
 /// @param param Address to pass to the function every time it is called. 
 /// @return Unused.
 int		_mlx_key_hook(t_win win_ptr,
-			int (*funct_ptr)(t_3dskey keycode, void *param), void *param);
+			int (*funct_ptr)(int keycode, void *param), void *param);
 
 /// @brief Assign a function which will be called when the window should be
 ///        redrawn.
@@ -90,4 +89,4 @@ int		_mlx_loop_end(void *mlx_ptr);
 int		_mlx_hook(t_mlx win_ptr, int x_event, int x_mask,
 			int (*funct)(), void *param);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/mlx_image.h b/include/mlx_image.h
index 4a626c1..545920f 100644
--- a/include/mlx_image.h
+++ b/include/mlx_image.h
@@ -37,22 +37,23 @@
 /// @param width Desired width of the image.
 /// @param height Desired height of the image.
 /// @return A reference to the image. NULL if failed.
-t_image	_mlx_new_image(void *mlx_ptr, int width, int height);
+t_image	mlx_new_image(void *mlx_ptr, int width, int height);
 
 /// @brief Get an address containing all the pixel values of the image. The user
 ///        can then modify the image using this pointer directly.
 ///
 /// @param img_ptr Image to use.
 /// @param bits_per_pixel Will be filled with the number of bits used for each
-///                       pixel. Will always be 24.
+///                       pixel. Can be NULL, result will always be 24.
 /// @param size_line Will be filled with the number of bytes used to store
-///                  a line of the image, aka 3 * width.
+///                  a line of the image, aka 3 * width. Can be NULL.
 /// @param endian Will be filled with the endianness of all color values.
-///               1 for big endian, 0 for little endian. Will always be 1.
+///               1 for big endian, 0 for little endian. Can be NULL, result
+///               will always be 1.
 /// @return Address to the data of the image.
 ///         Use `data[y * size_line + x * 3]` to get the first color value (red)
 ///         of a specific pixel.
-char	*_mlx_get_data_addr(t_image img_ptr, int *bits_per_pixel,
+char	*mlx_get_data_addr(t_image img_ptr, int *bits_per_pixel,
 			int *size_line, int *endian);
 
 /// @brief Draw an image on the window.
@@ -63,7 +64,7 @@ char	*_mlx_get_data_addr(t_image img_ptr, int *bits_per_pixel,
 /// @param x x position of the image to draw.
 /// @param y y position of the image to draw.
 /// @return Unused.
-int		_mlx_put_image_to_window(t_mlx mlx_ptr, t_win win_ptr, t_image img_ptr,
+int		mlx_put_image_to_window(t_mlx mlx_ptr, t_win win_ptr, t_image img_ptr,
 			int x, int y);
 
 // ???
@@ -79,6 +80,6 @@ t_image	_mlx_xpm_file_to_image(void *mlx_ptr, char *filename,
 /// @param mlx_ptr mlx connection identifier returned by mlx_init().
 /// @param img_ptr Image to destroy.
 /// @return Unused.
-int		_mlx_destroy_image(t_mlx mlx_ptr, t_image img_ptr);
+int		mlx_destroy_image(t_mlx mlx_ptr, t_image img_ptr);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/mlx_init.h b/include/mlx_init.h
index c8f2dda..e424af0 100644
--- a/include/mlx_init.h
+++ b/include/mlx_init.h
@@ -35,6 +35,8 @@
 ///
 /// @return The mlx connection identifier to use for all other functions.
 ///         NULL if failed.
-t_mlx	_mlx_init(void); // TODO should call this before REALLY anything else?
+t_mlx	mlx_init(void); // TODO should call this before REALLY anything else?
 
-#endif
\ No newline at end of file
+// TODO a mlx_end() necessary?
+
+#endif
diff --git a/include/mlx_put.h b/include/mlx_put.h
index e5ade71..510653d 100644
--- a/include/mlx_put.h
+++ b/include/mlx_put.h
@@ -41,7 +41,7 @@
 /// @param y y position of the pixel to set.
 /// @param color Color to use in 0x00RRGGBB format.
 /// @return Unused.
-int		_mlx_pixel_put(t_mlx mlx_ptr, t_win win_ptr, int x, int y, int color);
+int		mlx_pixel_put(t_mlx mlx_ptr, t_win win_ptr, int x, int y, int color);
 
 /// @brief Print text on the window.
 ///
@@ -57,4 +57,4 @@ int		_mlx_string_put(void *mlx_ptr, void *win_ptr, int x, int y, int color,
 // ???
 void	_mlx_set_font(void *mlx_ptr, void *win_ptr, char *name);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/mlx_window.h b/include/mlx_window.h
index 593b8cd..80aeca1 100644
--- a/include/mlx_window.h
+++ b/include/mlx_window.h
@@ -41,20 +41,21 @@
 ///               Maximum 240 to be able to adapt to the top screen of the 3DS.
 /// @param title  The title of the window. Unused in the 3DS.
 /// @return A reference to the window. NULL if failed.
-t_win	_mlx_new_window(t_mlx mlx_ptr, int size_x, int size_y, char *title);
+t_win	mlx_new_window(t_mlx mlx_ptr, int size_x, int size_y,
+			const char *title);
 
 /// @brief Clear the window in black.
 ///
 /// @param mlx_ptr mlx connection identifier returned by mlx_init().
 /// @param win_ptr Window to affect.
 /// @return Unused.
-int		_mlx_clear_window(t_mlx mlx_ptr, t_win win_ptr);
+int		mlx_clear_window(t_mlx mlx_ptr, t_win win_ptr);
 
 /// @brief Destroy a window.
 ///
 /// @param mlx_ptr mlx connection identifier returned by mlx_init().
 /// @param win_ptr Window to destroy.
 /// @return Unused.
-int		_mlx_destroy_window(t_mlx mlx_ptr, t_win win_ptr);
+int		mlx_destroy_window(t_mlx mlx_ptr, t_win win_ptr);
 
-#endif
\ No newline at end of file
+#endif
diff --git a/include/utilsconsole.hpp b/include/utilsconsole.hpp
new file mode 100644
index 0000000..09e3ddd
--- /dev/null
+++ b/include/utilsconsole.hpp
@@ -0,0 +1,52 @@
+/**
+ * utilsconsole.hpp
+ *   by Zy
+ */
+
+/**
+ * utilsconsole.hpp (uc_*() functions)
+ * Utility functions for the 3DS console.
+ */
+
+#pragma once
+
+#include <string>
+#include <vector>
+
+using namespace std;
+
+/// @brief To use with uc_menu(): Represent an element of the menu.
+typedef struct { 
+    /// @brief Displayed name.
+    string name;
+    /// @brief true if this button can be used to change the value of a number.
+    bool is_number_prompt;
+    /// @brief Only if is_number_prompt is true: the number to change.
+    int *value;
+    /// @brief Only if is_number_prompt is true: the minimum value possible for
+    ///        value.
+    int min;
+    /// @brief Only if is_number_prompt is true: the maximum value possible for
+    ///        value.
+    int max;
+} s_uc_menu_element;
+
+/// @brief Display a menu with several items in the console.
+/// @details
+/// Non-blocking function, must be called in loop.
+/// Only one menu can work at the same time. 'elements' must not change in
+/// address.
+/// @param elements A pointer to a vector of all the elements of the menu.
+/// @return The index of the confirmed element. If none, return -1.
+int uc_menu(vector<s_uc_menu_element> &elements);
+
+/// @brief Display a menu quickly using only confirm buttons.
+/// @details
+/// Blocking function. Will return -1 if aptMainLoop() becomes false.
+/// @param str Text representing each element. The last parameter must be NULL.
+/// @return The index of the confirmed element.
+int uc_menu_quick(const char *str, ...);
+
+/// @brief Blocks the program until the user presses A.
+/// @details Will also return if aptMainLoop() becomes false.
+void uc_pause(void);
diff --git a/source/main.cpp b/source/main.cpp
index d01f026..9bf999d 100644
--- a/source/main.cpp
+++ b/source/main.cpp
@@ -1,25 +1,182 @@
-#include <3ds.h>
-#include <stdio.h>
-
-int main(int argc, char **argv) {
-    gfxInitDefault();
-    consoleInit(GFX_TOP, NULL);
-
-	printf("Test Code::Blocks project!");
+extern "C" {
+#include "mlx.h"
+#include "3ds.h"
+}
+#include <iostream>
+#include <string.h>
+#include "utilsconsole.hpp"
 
-	printf("\x1b[20;15HPress Start to exit.");
-
-    while(aptMainLoop()) {
-        gspWaitForVBlank();
-        hidScanInput();
-
-        if(hidKeysDown() & KEY_START)
-            break;
-
-        gfxFlushBuffers();
-        gfxSwapBuffers();
-    }
-
-    gfxExit();
-    return 0;
-}
+using namespace std;
+
+static void draw_rainbow_image(t_mlx mlx, t_win win, int x, int y)
+{
+	cout << "Draw rainbow image at (" << x << "," << y << ")..." << endl;
+	uc_pause();
+	{
+		static const u32 red = 0xFF0000;
+		static const u32 green = 0x00FF00;
+		static const u32 blue = 0x0000FF;
+		t_image img = mlx_new_image(mlx, 30, 30);
+		char *img_data = mlx_get_data_addr(img, NULL, NULL, NULL);
+		for (int x = 0; x < 30; x++)
+		{
+			for (int y = 0; y < 20; y++)
+			{
+				if (x < 10)
+					memcpy(img_data + 3 * (y * 30 + x), &red, 3);
+				else if (x < 20)
+					memcpy(img_data + 3 * (y * 30 + x), &green, 3);
+				else
+					memcpy(img_data + 3 * (y * 30 + x), &blue, 3);
+			}
+		}
+		mlx_put_image_to_window(mlx, win, img, x, y);
+		mlx_destroy_image(mlx, img);
+	}
+}
+
+int main(void) {
+	void *const mlx = mlx_init();
+	void *win;
+
+	// MENU
+	{
+		switch (uc_menu_quick("pixels", "images", "quit", NULL))
+		{
+		case 0:
+			goto pixels;
+			break;
+		case 1:
+			goto images;
+			break;
+		}
+		goto end;
+	}
+
+pixels:
+	cout << "create window..." << endl;
+	uc_pause();
+	win = mlx_new_window(mlx, 400, 240, "hey");
+
+	cout << "clear window..." << endl;
+	uc_pause();
+	mlx_clear_window(mlx, win);
+
+	cout
+		<< "Put pixels for red green and blue" << endl
+		<< "at the top-left corner..." << endl;
+	uc_pause();
+	{
+		int block_y = 20;
+		for (
+			int block_x = 20, color = 0xFF0000;
+			block_x <= 60;
+			block_x += 20, color = color >> 8
+		)
+			for (int x = 0; x < 10; x++)
+				for (int y = 0; y < 10; y++)
+					mlx_pixel_put(mlx, win, block_x + x, block_y + y, color);
+	}
+
+	cout << "clear window..." << endl;
+	uc_pause();
+	mlx_clear_window(mlx, win);
+
+	cout << "destroy window..." << endl;
+	uc_pause();
+	mlx_destroy_window(mlx, win);
+
+	goto end;
+
+images:
+	cout << "create window..." << endl;
+	uc_pause();
+	win = mlx_new_window(mlx, 400, 240, "hoi");
+
+	cout << "clear window..." << endl;
+	uc_pause();
+	mlx_clear_window(mlx, win);
+
+	draw_rainbow_image(mlx, win, 185, 110);
+	draw_rainbow_image(mlx, win, -15, 100);
+	draw_rainbow_image(mlx, win, 385, 120);
+	draw_rainbow_image(mlx, win, 170, -10);
+	draw_rainbow_image(mlx, win, 200, 230);
+	draw_rainbow_image(mlx, win, -15, -10);
+	draw_rainbow_image(mlx, win, 385, -10);
+	draw_rainbow_image(mlx, win, -15, 230);
+	draw_rainbow_image(mlx, win, 385, 230);
+
+	cout << "Draw RG image at (20,10)..." << endl;
+	uc_pause();
+	{
+		t_image img = mlx_new_image(mlx, 30, 20);
+		char *img_data = mlx_get_data_addr(img, NULL, NULL, NULL);
+		for (int x = 0; x < 30; x++)
+		{
+			for (int y = 0; y < 20; y++)
+			{
+				u32 color =
+					((0xFF0000 * x / 30) & 0xFF0000)
+					| ((0x00FF00 * y / 20) & 0x00FF00);
+				memcpy(img_data + 3 * (y * 30 + x), &color, 3);
+			}
+		}
+		mlx_put_image_to_window(mlx, win, img, 20, 10);
+		mlx_destroy_image(mlx, img);
+	}
+
+	cout << "Draw GB image at (50,0)..." << endl;
+	uc_pause();
+	{
+		t_image img = mlx_new_image(mlx, 10, 50);
+		char *img_data = mlx_get_data_addr(img, NULL, NULL, NULL);
+		for (int x = 0; x < 10; x++)
+		{
+			for (int y = 0; y < 50; y++)
+			{
+				u32 color =
+					((0x00FF00 * x / 10) & 0x00FF00)
+					| ((0x0000FF * y / 50) & 0x0000FF);
+				memcpy(img_data + 3 * (y * 10 + x), &color, 3);
+			}
+		}
+		mlx_put_image_to_window(mlx, win, img, 50, 0);
+		mlx_destroy_image(mlx, img);
+	}
+
+	cout << "Draw BR image at (200,100)..." << endl;
+	uc_pause();
+	{
+		t_image img = mlx_new_image(mlx, 100, 100);
+		char *img_data = mlx_get_data_addr(img, NULL, NULL, NULL);
+		for (int x = 0; x < 100; x++)
+		{
+			for (int y = 0; y < 100; y++)
+			{
+				u32 color =
+					((0x0000FF * x / 100) & 0x0000FF)
+					| ((0xFF0000 * y / 100) & 0xFF0000);
+				memcpy(img_data + 3 * (y * 100 + x), &color, 3);
+			}
+		}
+		mlx_put_image_to_window(mlx, win, img, 200, 100);
+		mlx_destroy_image(mlx, img);
+	}
+
+	cout << "clear window..." << endl;
+	uc_pause();
+	mlx_clear_window(mlx, win);
+
+	cout << "destroy window..." << endl;
+	uc_pause();
+	mlx_destroy_window(mlx, win);
+
+	goto end;
+
+end:
+	cout << "Exit..." << endl;
+	uc_pause();
+
+	gfxExit();
+}
diff --git a/source/mlx_image.c b/source/mlx_image.c
new file mode 100644
index 0000000..5fe387a
--- /dev/null
+++ b/source/mlx_image.c
@@ -0,0 +1,123 @@
+/**
+ * mlx_image.c
+ *   for the project "MinilibX for 3DS"
+ *   by Zy
+ *   at https://github.com/frzysk/mlx3ds
+ */
+
+#include "mlx_image.h"
+
+#include <stdlib.h>
+#include "mlx_internal.h"
+#include "mlx_inline.c"
+
+t_image	mlx_new_image(void *mlx_ptr, int width, int height)
+{
+	t_internal_image	*r;
+
+	(void)mlx_ptr;
+	r = NULL;
+	r = malloc(sizeof(t_internal_image));
+	if (!r)
+		goto error;
+	r->data = NULL;
+	r->data = malloc(width * height * 3 * sizeof(u8));
+	if (!r->data)
+		goto error;
+	r->width = width;
+	r->height = height;
+	return (r);
+
+	error:
+	free(r);
+	return (NULL);
+}
+
+int	mlx_destroy_image(t_mlx mlx_ptr, t_image img_ptr)
+{
+	if (img_ptr)
+		free(((t_internal_image *)img_ptr)->data);
+	free(img_ptr);
+	return (0);
+}
+
+char	*mlx_get_data_addr(t_image img_ptr, int *bits_per_pixel,
+			int *size_line, int *endian)
+{
+	if (bits_per_pixel)
+		*bits_per_pixel = 24;
+	if (size_line)
+		*size_line = 3 * ((t_internal_image *)img_ptr)->width;
+	if (endian)
+		*endian = 1;
+	return ((char *)((t_internal_image *)img_ptr)->data);
+}
+
+/// @brief Return the minimum between a and b.
+/// @param a Number a.
+/// @param b Number b.
+/// @return The result.
+static inline int	min(int a, int b)
+{
+	return (a < b ? a : b);
+}
+
+/// @brief Return the maximum between a and b.
+/// @param a Number a.
+/// @param b Number b.
+/// @return The result.
+static inline int	max(int a, int b)
+{
+	return (a > b ? a : b);
+}
+
+int	mlx_put_image_to_window(t_mlx mlx_ptr, t_win win_ptr, t_image img_ptr,
+			int x, int y)
+{
+	// buffers
+	u8	*frame_data, *img_data;
+	int	// dimensions
+		frame_width, frame_height, img_width, img_height,
+		// interval of pixels to draw, to avoid drawing outside of the buffer
+		min_x_on_screen, max_x_on_screen, min_y_on_screen, max_y_on_screen,
+		// position relative to frame
+		x_on_screen, y_on_screen;
+	// variables that contain results of constant expressions
+	int	a, b;
+	u8	*c, *d, *e, *f;
+
+	mlx3ds_internal_drawstart(mlx_ptr, win_ptr);
+	frame_data = ((t_internal_win *)win_ptr)->framebuffer;
+	frame_width = ((t_internal_win *)win_ptr)->framebuffer_width;
+	frame_height = ((t_internal_win *)win_ptr)->framebuffer_height;
+	img_data = ((t_internal_image *)img_ptr)->data;
+	img_width = ((t_internal_image *)img_ptr)->width;
+	img_height = ((t_internal_image *)img_ptr)->height;
+	min_x_on_screen = max(x, 0);
+	max_x_on_screen = min(x + img_width, frame_width);
+	min_y_on_screen = max(y, 0);
+	max_y_on_screen = min(y + img_height, frame_height);
+	a = 3 * img_width;
+	b = 3 * frame_height;
+	c = img_data - 3 * x - a * y;
+	d = frame_data - 3 + b;
+
+	x_on_screen = min_x_on_screen;
+	while (x_on_screen < max_x_on_screen)
+	{
+		e = c + 3 * x_on_screen;
+		f = d + b * x_on_screen;
+
+		y_on_screen = min_y_on_screen;
+		while (y_on_screen < max_y_on_screen)
+		{
+			mlx_inline_drawcolor(
+				f - 3 * y_on_screen,
+				e + a * y_on_screen);
+			y_on_screen++;
+		}
+		x_on_screen++;
+	}
+	mlx3ds_internal_drawend(mlx_ptr, win_ptr);
+	return (0);
+}
diff --git a/source/mlx_init.c b/source/mlx_init.c
new file mode 100644
index 0000000..0d50bd0
--- /dev/null
+++ b/source/mlx_init.c
@@ -0,0 +1,29 @@
+/**
+ * mlx_init.c
+ *   for the project "MinilibX for 3DS"
+ *   by Zy
+ *   at https://github.com/frzysk/mlx3ds
+ */
+
+#include "mlx_init.h"
+
+#include "mlx_internal.h"
+#include <stdlib.h>
+#include "3ds.h"
+
+static t_internal_mlx	g_internal_mlx = {
+	.is_init_called = false,
+	.top_window = NULL,
+};
+
+t_mlx	mlx_init(void)
+{
+	if (g_internal_mlx.is_init_called)
+		mlx3ds_internal_fatalerror("mlx_init() must be called only once");
+	g_internal_mlx.is_init_called = true;
+	gfxInitDefault();
+	gfxSetDoubleBuffering(GFX_TOP, false);
+	gfxSetDoubleBuffering(GFX_BOTTOM, false);
+	consoleInit(GFX_BOTTOM, NULL);
+	return (&g_internal_mlx);
+}
diff --git a/source/mlx_inline.c b/source/mlx_inline.c
new file mode 100644
index 0000000..9f7c28d
--- /dev/null
+++ b/source/mlx_inline.c
@@ -0,0 +1,31 @@
+/**
+ * mlx_inline.c
+ *   for the project "MinilibX for 3DS"
+ *   by Zy
+ *   at https://github.com/frzysk/mlx3ds
+ */
+
+#include "3ds.h"
+
+/// @brief Write a color at a specific location of the memory,
+///        the 3 color values will be in the same order.
+///        It's basically a memcpy of 3 bytes.
+/// @param dest Address to the first color value of the destination.
+/// @param src Address to the first color value of the source.
+inline void	mlx_inline_drawcolor(u8 *dest, u8 *src)
+{
+	dest[0] = src[0];
+	dest[1] = src[1];
+	dest[2] = src[2];
+}
+
+/// @brief Write a color at a specific location of the memory,
+///        the 3 color values will be in opposite order.
+/// @param dest Address to the first color value of the destination.
+/// @param src Address to the first color value of the source.
+inline void	mlx_inline_drawcolor_invert(u8 *dest, u8 *src)
+{
+	dest[2] = src[0];
+	dest[1] = src[1];
+	dest[0] = src[2];
+}
diff --git a/source/mlx_internal.cpp b/source/mlx_internal.cpp
new file mode 100644
index 0000000..3a5f5b4
--- /dev/null
+++ b/source/mlx_internal.cpp
@@ -0,0 +1,35 @@
+/**
+ * mlx_internal.cpp
+ *   for the project "MinilibX for 3DS"
+ *   by Zy
+ *   at https://github.com/frzysk/mlx3ds
+ */
+
+#include "utilsconsole.hpp"
+
+extern "C" {
+#include "mlx_internal.h"
+#include "3ds.h"
+
+void	mlx3ds_internal_fatalerror(const char *msg)
+{
+	consoleInit(GFX_BOTTOM, NULL);
+	printf("\e[0;31m[mlx3ds] Fatal error:\e[0m\n%s\n", msg);
+	uc_pause();
+}
+
+void	mlx3ds_internal_drawstart(
+			t_internal_mlx *mlx_ptr, t_internal_win *win_ptr)
+{
+	win_ptr->framebuffer = gfxGetFramebuffer(GFX_TOP, GFX_LEFT,
+			&win_ptr->framebuffer_height, &win_ptr->framebuffer_width);
+	gspWaitForVBlank();
+}
+
+void	mlx3ds_internal_drawend(
+			t_internal_mlx *mlx_ptr, t_internal_win *win_ptr)
+{
+	gfxFlushBuffers();
+	gfxSwapBuffers();
+}
+}
diff --git a/source/mlx_internal.h b/source/mlx_internal.h
new file mode 100644
index 0000000..5844c1a
--- /dev/null
+++ b/source/mlx_internal.h
@@ -0,0 +1,71 @@
+/**
+ * mlx_internal.c
+ *   for the project "MinilibX for 3DS"
+ *   by Zy
+ *   at https://github.com/frzysk/mlx3ds
+ */
+
+/**
+ * Internal utils of the mlx3ds.
+ */
+
+#include <stdbool.h>
+#include "3ds.h"
+
+/// @brief Write an error message and exit the program.
+///
+/// @param msg Message to write. Must use less than 38 colons.
+void	mlx3ds_internal_fatalerror(const char *msg);
+
+typedef struct s_internal_win	t_internal_win;
+
+/// @brief Content of the mlx connection identifier.
+typedef struct s_internal_mlx
+{
+	/// @brief is true after mlx_init() was called, is false before.
+	bool			is_init_called;
+	/// @brief Window displayed on the top screen.
+	t_internal_win	*top_window;
+}	t_internal_mlx;
+
+/// @brief Represents a window.
+typedef struct s_internal_win
+{
+	/// @brief mlx connection identifier
+	t_internal_mlx	*mlx;
+	/// @brief Width of the window
+	int				width;
+	/// @brief Height of the window
+	int				height;
+	/// @brief Buffer of the screen.
+	u8				*framebuffer;
+	/// @brief Width of the screen (on x).
+	u16				framebuffer_width;
+	/// @brief Height of the screen (on y).
+	u16				framebuffer_height;
+}	t_internal_win;
+
+/// @brief Represents an image in memory.
+typedef struct s_internal_image
+{
+	/// @brief Width of the image
+	int				width;
+	/// @brief Height of the image
+	int				height;
+	/// @brief Address of the image data. Returned by mlx_get_data_addr().
+	u8				*data;
+}	t_internal_image;
+
+/// @brief To call before drawing. Init winptr->framebuffer.
+///
+/// @param mlx_ptr mlx connection identifier
+/// @param win_ptr Reference to the window to draw on.
+void	mlx3ds_internal_drawstart(
+			t_internal_mlx *mlx_ptr, t_internal_win *win_ptr);
+
+/// @brief To call when finish drawing. Flush and swap buffers.
+///
+/// @param mlx_ptr mlx connection identifier
+/// @param win_ptr Reference to the window to draw on.
+void	mlx3ds_internal_drawend(
+			t_internal_mlx *mlx_ptr, t_internal_win *win_ptr);
diff --git a/source/mlx_put.c b/source/mlx_put.c
new file mode 100644
index 0000000..d5ddb0c
--- /dev/null
+++ b/source/mlx_put.c
@@ -0,0 +1,32 @@
+/**
+ * mlx_put.c
+ *   for the project "MinilibX for 3DS"
+ *   by Zy
+ *   at https://github.com/frzysk/mlx3ds
+ */
+
+#include "mlx_put.h"
+
+#include "mlx_internal.h"
+#include "mlx_inline.c"
+
+int	mlx_pixel_put(t_mlx mlx_ptr, t_win win_ptr, int x, int y, int color)
+{
+	u8	*frame;
+
+	mlx3ds_internal_drawstart(mlx_ptr, win_ptr);
+
+	if (x < 0 || x >= ((t_internal_win *)win_ptr)->framebuffer_width
+		|| y < 0 || y >= ((t_internal_win *)win_ptr)->framebuffer_height)
+		return (0);
+	frame = ((t_internal_win *)win_ptr)->framebuffer;
+	mlx_inline_drawcolor(
+		frame + 3 * (
+			(x + 1) * ((t_internal_win *)win_ptr)->framebuffer_height - y - 1
+			),
+		(u8 *)&color);
+
+	mlx3ds_internal_drawend(mlx_ptr, win_ptr);
+
+	return (0);
+}
diff --git a/source/mlx_window.c b/source/mlx_window.c
new file mode 100644
index 0000000..aec4586
--- /dev/null
+++ b/source/mlx_window.c
@@ -0,0 +1,52 @@
+/**
+ * mlx_window.c
+ *   for the project "MinilibX for 3DS"
+ *   by Zy
+ *   at https://github.com/frzysk/mlx3ds
+ */
+
+#include "mlx_window.h"
+
+#include "3ds.h"
+#include "mlx_internal.h"
+#include <stdlib.h>
+
+t_win	mlx_new_window(t_mlx mlx_ptr, int size_x, int size_y, const char *title)
+{
+	t_internal_win	*r;
+
+	(void)title;
+	if (size_x > GSP_SCREEN_HEIGHT_TOP || size_y > GSP_SCREEN_WIDTH)
+		mlx3ds_internal_fatalerror("Window too big for the screen");
+	r = malloc(sizeof(t_internal_win));
+	if (!r)
+		return (NULL);
+	r->mlx = mlx_ptr;
+	r->width = size_x;
+	r->height = size_y;
+	r->framebuffer = NULL;
+	return (r);
+}
+
+int	mlx_clear_window(t_mlx mlx_ptr, t_win win_ptr)
+{
+	u8	*frame_i;
+	u8	*frame;
+
+	mlx3ds_internal_drawstart(mlx_ptr, win_ptr);
+	frame = ((t_internal_win *)win_ptr)->framebuffer;
+	frame_i = frame
+		+ 3 * ((t_internal_win *)win_ptr)->framebuffer_width
+		* ((t_internal_win *)win_ptr)->framebuffer_height;
+	while (--frame_i >= frame)
+		*frame_i = 0x00;
+	mlx3ds_internal_drawend(mlx_ptr, win_ptr);
+	return (0);
+}
+
+int	mlx_destroy_window(t_mlx mlx_ptr, t_win win_ptr)
+{
+	((t_internal_mlx *)mlx_ptr)->top_window = NULL;
+	free(win_ptr);
+	return (0);
+}
diff --git a/source/utilsconsole.cpp b/source/utilsconsole.cpp
new file mode 100644
index 0000000..5706453
--- /dev/null
+++ b/source/utilsconsole.cpp
@@ -0,0 +1,93 @@
+/**
+ * utilsconsole.cpp
+ *   by Zy
+ */
+
+#include "utilsconsole.hpp"
+
+#include <3ds.h>
+#include <iostream>
+#include <stdarg.h>
+
+int uc_menu(vector<s_uc_menu_element> &elements) {
+    static void *lastElements = NULL;
+    static size_t selected = 0;
+
+    bool confirmed = false;
+
+    if (&elements != lastElements) {
+        // init if new menu
+        consoleClear();
+        lastElements = &elements;
+        selected = 0;
+    }
+    else {
+        // read inputs
+        hidScanInput();
+        if (hidKeysDown() & KEY_UP) {
+            if (selected-- == 0)
+                selected += elements.size();
+        }
+        else if (hidKeysDown() & KEY_DOWN) {
+            if (++selected >= elements.size())
+                selected -= elements.size();
+        }
+        else if (!elements[selected].is_number_prompt) {
+            if (hidKeysDown() & KEY_A) {
+                confirmed = true;
+                lastElements = NULL;
+            }
+        }
+        else {
+            if (hidKeysDown() & KEY_LEFT)
+                if (*elements[selected].value > elements[selected].min)
+                    (*elements[selected].value)--;
+            if (hidKeysDown() & KEY_RIGHT)
+                if (*elements[selected].value < elements[selected].max)
+                    (*elements[selected].value)++;
+        }
+    }
+
+    // display
+    cout << "\e[H\e[0m";
+    for (size_t i = 0; i < elements.size(); i++) {
+        cout << (i == selected && !confirmed ? "\e[7m" : "")
+            << elements[i].name << "\e[0m";
+        if (elements[i].is_number_prompt)
+            cout
+                << ((*(elements[i].value) == elements[i].min) ? "  " : " <")
+                << *(elements[i].value)
+                << ((*(elements[i].value) == elements[i].max) ? " " : ">");
+        cout << "\e[0K" << endl;
+    }
+    if (!confirmed)
+        cout << "\e[2m" << "[Up/Down] Move / "
+            << (elements[selected].is_number_prompt ?
+            "[Left/Right] Modify" : "(A) Confirm") << "\e[0K" << endl;
+    else
+        cout << "\e[2mOK.\e[0K\e[0m" << endl;
+    
+    return confirmed ? selected : -1;
+}
+
+int uc_menu_quick(const char *str, ...) {
+    va_list arguments;
+    auto elements = vector<s_uc_menu_element>();
+    for (va_start(arguments, str); str; str = va_arg(arguments, const char *))
+        elements.push_back({str, false, NULL, 0, 0});
+    
+    int r = -1;
+    while (r < 0 && aptMainLoop())
+        r = uc_menu(elements);
+    return r;
+}
+
+void uc_pause(void) {
+    cout << "\e[0;2mPress (A) to continue...\e[0m" << endl;
+    while (aptMainLoop()) {
+        hidScanInput();
+        if (hidKeysDown() & KEY_A)
+            break;
+        gfxFlushBuffers();
+    }
+}
\ No newline at end of file