PeP sets out to follow the person. The light body reacts to the person's movement by focusing in the person's direction, and follows the person when she walks around. If the person is no longer present or is standing still, PeP is not able to recognise her lived-body and the person will become an object in space. PeP now starts to explore the space. When the person is too active, PeP will return its focus inwards; the light body moves to the middle of the grid. The behaviour of the light body is continuous. It does not jump from position to position but adjusts gradually. When the light body focuses on the person it will first actively explore by moving along the side where the person is present. Besides perceiving the person, the light body perceives an external event. For this event I chose two pieces of modern music. PeP undertakes perceptive actions towards the music. It focuses the light body in the direction of the music and bounces to the beat when it likes the music.