Perpetuum mobile realizes continually moving and rotating balls. With sound-output originates such a music-piece that proceeds from start until end in equally swift speed. Up to 250 balls jump in an area around. The ball-movement can take place with gravity and impulsively. As spectator-position can be selected the screen, the room-middle, a ball or an elevator. Hereby special visual and acoustic effects come to the validity. The user can plan diverse attitudes with dialogue-sides. The further can be started a small reaction-game or a screen-saver in Perpetuum mobile.