void OnGUI()
{
DrawRectangle( new Rect(Screen.width-100, 0, 100, 20), new Color(0f ,0.0f ,0.1f ,0.65f));
DrawRectangle( new Rect(Screen.width-100, 0, progress*100, 20), new Color(0f ,0.9f ,1f ,1f));
/*// Constrain all drawing to be within a pixel area .
GUI.BeginGroup (new Rect (Screen.width-100, 0, progress*100, 20));
// Define progress bar texture within customStyle under Normal > Background
GUI.Box (new Rect (0,0, 100, 200), "Expérience");
// Always match BeginGroup calls with an EndGroup call
GUI.EndGroup ();*/
}