Rue du Marche au Charbon, Brussels 1000
A subtle trace drawn on the pavement near bar Au Soleil. Brussels street=cleaning cars have two spinning brooms at the front. They gather dirt between them which is then sucked into the reservoir of the car. Many streets which are not accessible for cars are shut of by poles that can lower into the ground. This however takes a little time. While the sweeping car is waiting for them to be completely lowered, the still spinning brooms draw patterns on the cobble stones.