LHC Washing give a view of the inside of a machine though polyptych. I decided to set up 9 washing machine on three levels. They join each other by vertical cuts, allowing a video projector to move into 8 machines around the last one. the projector can go from corner to corner thanks to a pulley system installed in the machines. The all system is activated by moves of public in space. The projector moves gets faster as the spectator comes closer. Light beams in the room give the desire to come closer and discover what is happening in the machines.