public static void AddMineListener(UnityAction<bool> handler)
 {
     listenerMine = handler;
     if (invokerMine!=null)
     {
         invokerMine.AddMineListener(listenerMine);
     }
 }
 public static void AddMineInvoker (TimerCountdown script)
 {
     invokerMine = script;
     if (listenerMine != null)
     {
         invokerMine.AddMineListener(listenerMine);
     }
 }