Part of a Roomba Art picture series produced by Tobias Baumgartner, Marcus Brandenburger, Tom Kamphans, Alexander Kroeller, and Christiane Schmidt of the IBR Algorithm Group and Braunschweig University of Technology.
We had a swarm of seven Roombas, each with a differently colored LED on top. The roombas are operating at the same time, the artists said in their Flickr account.
The works were made by attaching bright LED's to the top of Roomba automated room cleaners and photographing them with long-exposure cameras.
The resulting are the time-lapse compositions: