Winner of the BBI creation contest of 2001, Andreas Gysin imagines ARSENAUX 25, 27, 29, 31 a light show for inhabitants and switches. During the night, each window is a either a luminous dot or a black hole. By following a partition written by Andreas Gysin especially for this single presentation, the 115 inhabitants of Arsenaux 25, 27, 29, 31 flip the switches of their apartments and draw luminous patterns on the frontage of their buildings.