Index: callback.h
===================================================================
--- callback.h	(revision 0)
+++ callback.h	(revision 1)
@@ -0,0 +1,34 @@
+#ifndef _CALLBACK_H
+#define _CALLBACK_H
+
+/*=
+Callbacks
+1500
+**/
+
+// Introduction
+/**
+This file contains many initializations, a few internal callbacks, but 
+will provides a very important function for end-user, wich will 
+gives user display function to Raydium: see below
+**/
+
+
+extern void raydium_callback_image (void);
+/**
+Internal use.
+**/
+
+extern void raydium_callback_set (void);
+/**
+Internal use.
+**/
+
+extern void raydium_callback (void (*loop));
+/**
+This function will loop over the provided display function, indefinitely.
+"loop" must be: 
+%%(c) void loop(void) %%
+**/
+
+#endif