The Tumbler is a “simple physics simulation/meditation/relaxation experiment” created by Andrew Hoyer which has left me totally enraptured. This beautiful code experiment uses a series of shapes which, when they touch, make lovely little sounds. You can then speed up or slow down the shapes which then changes the pitch of the sound the shapes make. The slower sounds are extremely pacifying, like something you can put on another screen and chill out.
You can see many more of Andrew’s experiments by clicking here.