Screensavers are great. I spent endless hours watching Screen Antics (aka Johnny Castaway)[1], and the silly things he did.
But I also watched countless hours watching this art screensaver that came with my Canon printer (I think it was Canon). It just animated the painting process. I think it was called something like Canon Creative, but I'm not sure. I'd love to find that screensaver again - That'd instantly take me back 20 years.