I had a couple ideas for simple screensavers like this, here's one of the easier ones to program. I'll be doing more stuff like this in the future. Technically, if you let the program run indefinitely, eventually every line will be traveled on.
I made this myself in less than half an hour. If you want to run it in Turbo Mode, you have to get rid of one Wait block in the code (It's already marked with a comment).