Cycloid Pen Plotter

Create random geometric patterns (cycloids) on a 3D printed CoreXY style pen plotter.

This is an update to my [Etch A Sketch](https://www.hackster.io/MrRoboto19). This was one of my favorite projects, but unfortunately the strings keep breaking inside the Etch A Sketch and they are not easily repairable.

Mechanical drawing machines have been around for a while. Early versions included the Marvelous Wondergraph, Hoot Nanny, and the popular [Spirograph](https://en.wikipedia.org/wiki/Spirograph). Newer versions from Joe Freedman can be found at his website [LEAFPDX](http://leafpdx.bigcartel.com). The Cycloid Pro is on my xmas list (hint, hint). KrazyDad created a nice online version that you can play with. It is located [here](https://krazydad.com/blog/2015/07/12/cycloid-drawing-machine-simulation).

The Arduino program will simulate a drawing machine. It will place random gears and connecting arms around the drawing area. But, instead of turning the paper, all of the gears and