The STNICCC2000 demo by Oxygene is a classic on Atari ST, which was ported on many other machines. In 2022 it now works on any PC with msdos, even on a 8088/8086, but a 80286 is preferred for a reasonable speed.

You can see the demo running on an Amstrad PC 3086 (video by FreddyV, see below) or the official video of the Revision 2022.