add raylib and test window

main.c

@@ -9,6 +9,8 @@
  * @license GNU GPL v3
  */
 
+#include "raylib.h"
+
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
@@ -41,5 +43,19 @@ int main(int argc, char* argv[])
 
 	print_datapoint_list(head);
 
+	// Raylib test window
+	SetTraceLogLevel(4);
+	const int screenWidth = 800;
+	const int screenHeight = 600;
+	InitWindow(screenWidth, screenHeight, "Raylib basic window");
+	SetTargetFPS(60);
+	while (!WindowShouldClose()) {
+		BeginDrawing();
+		ClearBackground(RAYWHITE);
+		DrawText("It works!", 20, 20, 20, BLACK);
+		EndDrawing();
+	}
+	CloseWindow();
+
 	return EXIT_SUCCESS;
 }