Press the green flag to infinitely generate fives. press space to delete the copies, and it will start all over. If you hold down space, it looks like numbers are rushing upwards. Plus, if you go fullscreen and let your eyes unfocus, it looks some numbers are popping out of the screen!
Inspired by Math (not a person, math. Actual math.) I needed to move all the numbers in my head somewhere (I'm doing algebra) so I moved it here.