This is one of two works shown at the London  Biennale 2002.

 A small motor on a slide moves up to the top of the  slide, causes a receptionists bell to make a delicate  ding, waits a couple of seconds and then goes down  to the bottom. It waits at the bottom for a couple of  seconds and then goes up to the top again. This is a  continuous process. It takes about four minutes to  complete the cycle.

     The circuit is from the book.

The photograph on the left is a detail.