Gear chain

A chain made of intertwined gears, when the first gear is rotated, all the following gears rotate at different speeds, generating erratic patterns.

I didn't invent this design, I remember seeing it in a Youtube video, of which I forgot the title and I can't find it anymore. If anyone already knew about this design, let me know.

The "weel" and "arm" modules requires printing supports. Assembly requires glueing. You can make the chain as long as you'd like, by making more "smallGear" and "arm" modules. The first link is made of a base, a weel and one smallGear, the intermediate links are made of an arm and a smallGear, while the last one is made of an arm, a smallGear and a bigGear.