[madelinw]

I recreated this in CSS/JS a few years ago, inspired by this video.

https://codepen.io/madelinw/details/ocnCl

[abecedarius]

Same principle, though not a physical simulation: http://wry.me/hacking/moire-eel.html

By moving the mouse you can amuse yourself with various Moiré effects.

[ubershmekel]

I made it with webgl: http://toplessproductions.com/pendulum/

[murkle]

2D View from above (in GeoGebra)

https://www.geogebra.org/m/yCe42MAX