(There's no video for Bars yet. Please contribute to MR and add a video now!)
Bars is a tiny (2.9KB !) screen saver application that once launched starts animating bars on the screen moving in various patterns. What's cool about it is that typing a random key on your keyboard changes the algorithm. So you can type a new key once in a while to try something else until you find the pattern you like the most ;-)
Press space bar to quit.
Bars.sit (2 KiB / 2.05 KB)
Bars / compressed w/ Stuffit
This app works on any 68K or PPC Macintosh model.
Note: I am very impressed that, altough this app was made in 1987, it still works perfectly under Mac OS 9 even if the screen resolution is high and the color depth is thousands of colors, which is quite impressive.
Emulating this? It should run fine under: Mini vMac