Perpetuum mobile highlights 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 500 balls can be shown at one time. The ball movement can be selected to follow gravitation rules or be manipulated impulsively. The spectator position can be the screen, the middle of the room, on a ball, or on an elevator. Hereby special visual and acoustic effects come to the validity. The user can plan diverse attitudes from six dialog-sides and save these into a file. The further can be started a small reaction-game and a screensaver.