Viktor is the younger brother of Hektor, a spraycan robot. Viktor on the other hand uses chalk and likes blackboards. Viktor has 4 motors instead of 2, but otherwise they are quite similar. You can send almost any vector image to these devices and they will draw/spray them on a wall. If you’re in London, you can go see Viktor in action at the exhibition ‘A Recent History of Writing and Drawing’ at the Institute of Contemporary Art. Both were developed by Jürg Lehni.