Use this as a timer. It will ask for hours. Enter how many hours for your timer. If you only want minutes and seconds, enter 0. Next it will ask you for minutes. enter how many minutes you want. If you only want seconds, enter 0. Next it will ask for seconds. Enter how many seconds you want. After you finish, press space at any time to start the timer. It will show a nuclear missile falling. When it hits the target, it will explode. Depending on how long you set the timer, it will fall at different speeds.
Thanks to Fatkidplayer for the explosion.