Two black and white panels each mounted on a stepping motor, revolving and turning to and fro. They perform a pre-programmed rhythmical dance lasting about 3 minutes exploring all the possibilities: they move together, independently, smoothly, abruptly, fast, slow, left and right.

As an experiment I put a Walkman between the panels, switched to REC and listened on the headphones to the cello-like sound of the panels zipping past the mikes - the only time I have used amplification; for me, almost akin to cheating. Later, I learnt how to make louder panels.