Two different views of a binary tree, and an animation to show that intuitively they are equivalent. Just hit run. No parameters.
Simplifying so that this can be used as a demo to control an actual hardware etch-a-sketch using an arduino and two stepper motors. Real etch-a-sketch requires no use of pen up/pen down - it's all one line. However you can backtrack over a line as magesticness did in his original code.
