PeR is a carpet with integrated sensing and actuating capabilities. It is able to detect the touch of the person and a light body behaves in the surface of the rug. The following behaviour that is described in the first chapter is implemented in PeR. The light body follows your touch. A little change in the algorithm means that the light body follows your touch on a humble distance and shyly moves away from your hand when you directly touch it. Although the change in implementation is minimal, the effect appears to be rather fascinating. Moreover, the dynamic qualities and appearance of the light body are easily altered: for example, a big and slow body influences the interaction tremendously compared to a small and quick body.