After Dark CSS
I totally forgot that back in the early 90's, paid screen savers were a thing, not the least popular of which was a little program called After Dark. That's all it was, maybe 10-12 screen savers, but they were fully animated and actually very pleasing to watch, walking by an office and seeing flying toasters on a 20" CRT.
I found this little CSS-powered version of these screen savers and experienced some fond nostalgia.