The sphere’s size is indefinite. It is supplied with degrees of longitude and latitude. Its surface is being explored. The route to follow uncertain. The movement’s velocity and the distance towards the surface, with regard to the centre, is defined. The spectator is situated in or outside the sphere. He’s looking along the radius for as long as he wants or is able to. The video is preferably shown on a separate monitor around which the spectator can freely move. The video’s length is unlimited.