public void undo()
 {
     hottub.off();
     hottub.cool();
     hottub.bubblesOff();
 }
 public void execute()
 {
     hottub.cool();
     hottub.Off();
 }
 public void undo()
 {
     hottub.On();
     hottub.cool();
     hottub.Off();
 }
 public virtual void execute()
 {
     hottub.cool();
     hottub.off();
 }