Roombas. They’re beautiful.
Check out what the IBR Algorithm Group and Braunschweig University of Technology made with 7 Roombas and a long exposure. The Roombas were attached with different colored LED lights, and set free to do their thing. This photograph is part of the IBR Group’s Roomba Art time-lapse photo series.
IBR Roomba Swarm in the Dark I produced by Tobias Baumgartner, Marcus Brandenburger, Tom Kamphans, Alexander Kroeller, and Christiane Schmidt. source: IBRoomba on Flickr