Just as in the previous installation, the visitor starts by choosing on of the three manifolds (flat, spherical, hyperbolic). The interaction control is supported by an elastic string placed in the middle of the room.

Just as in the previous installation, there are many light beams that begin and end in the same particle. Thus, visitors control the path of the particle and, as a consequence, see the same curve repeated in various directions and distances. The curves are drawn as a function of the particle.