A look at American art in the 1960s. 62 seconds of Len Lye's completed film "Free Radicals," consisting of patterns scratched on the film. Shots of Lye explaining "Ritual Dance," a complicated metal sculpture involving a tall steel rod surrounded by six shorter rods with bells on top swaying in counterpoint. . Some shots toward the top of the piece, and many of Lye sitting on the floor below it.