@Override
 public void run() {
   hideAll();
   restartBtn.setVisibility(View.VISIBLE);
   menuBtn.setVisibility(View.VISIBLE);
   helpBtn.setVisibility(View.VISIBLE);
 }
 public void hideAll() {
   pauseBtn.setVisibility(View.GONE);
   hintBtn.setVisibility(View.GONE);
   nextBtn.setVisibility(View.GONE);
   restartBtn.setVisibility(View.GONE);
   menuBtn.setVisibility(View.GONE);
   helpBtn.setVisibility(View.GONE);
 }
 @Override
 public void run() {
   hideAll();
   nextBtn.setVisibility(View.VISIBLE);
   menuBtn.setVisibility(View.VISIBLE);
 }
 @Override
 public void run() {
   hideAll();
   pauseBtn.setVisibility(View.VISIBLE);
   hintBtn.setVisibility(View.VISIBLE);
 }