"Requiring just two nails and a power plug, the device can be installed in less than five minutes. It then uses inbuilt engines to move, draw, erase and re-draw new content a limitless amount of times"
Full article here: https://www.dezeen.com/2018/04/04/carlo-ratti-scribit-writing-robot-turns-walls-into-digital-canvases-milan-design-week/
Original project located here: https://carlorattiassociati.com/project/scribit/