public bool UndoCommand()
 {
     if (bomber != null)
     {
         bomber = Object.FindObjectOfType <BombReceiver>();
     }
     return(bomber.Unbomb());
 }
 public bool ExecuteCommand()
 {
     if (bomber == null)
     {
         bomber = Object.FindObjectOfType <BombReceiver>();
     }
     return(bomber.Bomb());
 }