Watch an early experiment using computers to animate film. The result is a dazzling vibration of geometric forms in vivid colour, an effect achieved by varying the speed at which alternate colours change, so producing optical illusions. In between these screen pyrotechnics there appears a simple line form gyrating in smooth rhythm. Sound effects are created by registering sound shapes directly on the soundtrack of the film.
Around Perception, Pierre Hébert, provided by the National Film Board of Canada