Gijs van Bon's Skryf machine is far from the world's first automatic graffiti machine. But it could be the first that won't have law enforcement ready to throw the cuffs on him. That's because the self-propelled device uses a modified CNC milling machine to 'print' messages on the ground using nothing but harmless sand.
All van Bon has to do is type a message—usually poems or other inspirational literature—into an onboard laptop and hit go. The machine does all the rest, leaving behind a trail of surprisingly crisp letters at a rate of about 525 feet per day.
And instead of a team of city workers armed with harsh chemicals and scrub brushes, all that's needed to clean away this 'vandalism'--Sandalism?––is a windy day, a light burst of rain, or bustling pedestrian traffic. [Skyrf via Dezeen]