This is simulation of one pendulum attached to other pendulum. Observe strange behaviour. Real pendulums behave (probably) the same. Have fun! Green flag to start. Space - random parameters 0-9 - presets, a - circle preset (@Crystall), r - Chaotic preset z - n presets (by @jtopcool) t - toggle trace, e - earth gravity and resistance o - 0 resistance m - ball bouncing simulation arrows - slightly change rods' speed - experiment Press J to make the music react to the pendulum (its funny) press K to turn it back. Song: chromaticness (by me)