Well, we wanted to get at least something going by the end of Easter, and we made it (barely)! Right now all that it does is slowly crank the stepper forward and follow the potentiometer for side-to-side motion, but hey—it works! The next step is to get actual shapes and directives coming across—probably with a serial connection. I tried using my official Hackaday Trinket Pro, but an Arduino update killed whatever kext let me program it, so... we'll return to that later. Forgive the Leonardo for now, please ;-)