Beats: From the XScreenSaver Collection, 2020. 

Draws figures that move around at a slightly different rate from each other, creating interesting chaotic and ordered patterns.
Written by David Eccles; 2020.
XScreenSaver is a collection of hundreds of free screen savers for X11, MacOS, iOS and Android. Download them all here:
www.jwz.org/xs...
This playlist contains videos of them all:
• XScreenSaver