SignWaves was the first project in The Optics of Memory series. SignWaves is a set of interactive display stations developed with the assistance of electronic artist Chris Yewell that captures the gestures of onlookers, which in turn become looped material for the art. Their actions are repeated over and over in an ongoing feedback loop, creating patterns of infinite complexity.
Check out this excellent write-up about SignWaves by Cycling'74
The making of the SignWaves enclosure by Kent State School of Architecture students, led by Prof. Diane Davis.