The Light Cloud at the Merck Innovation Center detects visitors’ movements in the room and translates them into many different moods. The generative sculpture stimulates and facilitates intense encounters between people and technology. The room-filling installation consists of four curved strands that are concentrically superimposed and slightly shifted in relation to each other. OLED elements that are attached to the strands and controlled by sensors react to the visitors’ movements and to sound compositions. In combination, this generates a complex mosaic in which sound and light interact playfully and the viewers leave traces.