There was a time when screensavers were a must on computers. That time was pretty much the 1990s and early 2000s. Some screensavers were simply random images that would be generated through code and go on until infinity or at least until you touch the mouse or keyboard.
Some of Coleco ADAM’s users were using SmartBASIC to make elaborate animated art that could have been screensavers, though I’m sure they didn’t know that at the time. The book “32 BASIC Programs for the Coleco ADAM” had such a program. It will seem rather plain by today’s standards, but I was in awe when I typed this out and ran it on my ADAM back in the mid 1980s.
Check out the video to see for yourself.
Here is the program: