Video installation by the creative Brooklyn duo Sweatshoppe. The principle is simple: a LED roller paints video onto a wall. The effect is guaranteed.
Thanks to the programming language called Max/MSP, Blake Shaw wrote a software that makes possible the projection of video visible when it comes in contact with the LED lights on the roller.
The video below is Sweatshoppe at it on top of Cordy House, Shoredith, London towards the end of last year.