An Electric Gallery (Toronto) installation consisting of four robots crawling back and forth along separate ceiling tracks, and a fifth floor-situated robot. Each machine has a rotating antenna-like scanner, designed to point itself toward any strong light-source, and a spotlight mounted at the center of its scanner. Ceiling robots therefore tend to lock into each others’ gazes until their non-responsive track-motors pull them apart. Given the simplicity of the control principles, the group behavior can be surprisingly complex. 
Built in homage to W. Grey Walter, an early pioneer in brain research and the artificial modelling of organic behavior.
http://www.normill.ca/artpage.html] (consulted 27.10.08)

Norman White