How can I back it?

Question

I want to play it infinity.How?
https://code.sololearn.com/Wyex95tQykI5/?ref=app

Answer 1

when frame() is done run frame() in revese when thats done run frame()
https://code.sololearn.com/WGrkKq6j4kUK/#html

Answer 2

JME Thanks.

Answer 3

Here is the solution.but has a problem when I click button again and again.
https://code.sololearn.com/WeA28ciWT7v4/?ref=app