Made me think of our old student project - a drawing robot with CD-ROM tray mechanism that handled a marker pen and drove on a piece of paper with stepper motors and toy wheels, drawing arbitrary vector images: https://youtu.be/GWRNpv_topQ?t=50

It took it a while to draw anything though, and you had to be super careful to not pull on its cables while it was working as that would destroy the drawing - it had no way to orient itself in space whatsoever :)