100 double pendula
https://lab.amcc.io/100-pendula/
Daniel Shiffman created a fantastic description on creating a double pendulum with Processing here: https://youtu.be/uWzPe_S-RVE. I have created a class to make double pendulums so that i can make as many as i want.
The double pendulum is pretty interesting and i've been fascinated with them since I read Chaos by James Gleich and even more so after reading Foucault's Pendulum by Umberto Eco.
There's a lot you can do to play with pendulums, if you want to play with the code i've made here's the sketch you can clone: