DEMO -> Other   

Jules Lissajoux was a French physicist of the last century who made a study of the movement of particles under the action of periodic motion, acting at right angles to each other. Bodies moving in this way create intricate patterns as they dance around each other.
In this program - not written by M. Lissajoux - frequencies are generated at random (lines 120 and 130), starting a new figure each time you press a key.

Paru sous forme de listing dans le magazine "Amstrad Action" Issue 3, December 1985