public static void fadeOutIn(float transTime, GUIArea[] exit, GUIArea enter)
 {
     foreach (GUIArea e in exit)
     {
         e.exitFade(transTime);
     }
     enter.enterFade(transTime);
 }
 //transition from one GUIArea to Another
 public static void fadeOutIn(float transTime, ref GUIArea exit, ref GUIArea enter)
 {
     exit.exitFade(transTime);
     enter.enterFade(transTime);
 }