Movies are made out of darkness as well as light; it is the surpassingly brief intervals of darkness between each luminous still image that make it possible to assemble the many images into one moving picture. Without that darkness, there would only be a blur. Which is to say that a full-length movie consists of half an hour or an hour of pure darkness that goes unseen. If you could add up all the darkness, you would find the audience in the theater gazing together at a deep imaginative night.