Watch Around Perception for Free: How to Stream the Movie Online at 123Movies. . An early experiment in employing computers to animate film. The result is a dazzling vibration of geometric forms in vivid color, an effect achieved by varying the speed at which alternate colors change, so producing optical illusions. In between these screen pyrotechnics appears a simple line form gyrating in smooth rhythm. Sound effects are created by registering sound shapes directly on the soundtrack of the film.