Here is a "Banded Clock" by Golan Levin, hosted on OpenProcessing.org at https://www.openprocessing.org/sketch/503941, and embedded here using an iFrame. (Note that the actual dimensions of this sketch are 600x200 pixels, but because I don't have an OpenProcessing "pro" account, I can't hide the OpenProcessing branding at the top, so I've added an additional 50 pixels of height to accommodate.)