File:Musical note - OpenSquare

Description
OpenSquare is a remotely controlled message writer. Place it in a city square, press play, and watch it spell you message with a trail of powder. It is built with a toy RC car, an arduino and £5 worth of standard Poundland items.

Instructions on http://streettoolbox.com/wiki/Opensquare

Tags: street art, arduino, hack, urban intervention, rc car, opensquare