Three colours are given to the audience e.g. red, yellow and blue. Now they are asked to invent locations matching the colors, such as hell, desert, and cold storage. Now the stage is flooded with one of the colored lights. The players now set up a scene in the desert with yellow light, a scene in hell with red light and a scene in the cold-storage depot with blue light. The stage lighting will now change to and fro between the three colors. The players respond by changing between the various scene locations depending on the given color.
by Guido Boyke