Text shifted.

Woops. Don't hit enter before putting text!
https://www.khanacademy.org/computer-programming/pong-20-beta/5772385781284864 So in this old program if you notice the text will sometimes shift around when playing pong. Then you change the do nothing variable and it fixes. An old but still working (broken?) bug.

Start by reproducing the text shifting in the linked Pong program, especially while changing the do-nothing variable. Trace the live editor behavior involved in running that program; done means the text remains stable during play regardless of that variable.

Written by the indexing model from the issue text.