Urs Lehni's In a Beautiful Place Out in the Country.

Urs Lehni designed this piece, called In a Beautiful Place Out in the Country, for the "Wenn Roboter Zeichnen" (When Robots Draw) in the Kunstmuseum Solothurn, Switzerland in 2004.

The automated grafitti sprayer is called Hektor, built by Jürg Lehni and Uli Franke:

Hektor consists of a suitcase which contains two electric motors, a spray-can holder, toothed belts, cables, a strong battery and a circuit board which is connected to a laptop and controls the machine. The motors that are mounted onto the wall suspend the can holder through the toothed belts and define its position by changing the length of these belts.

Hit play or go to Link [YouTube] | Hektor website | In a Beautiful ... article - Thanks gigz!