The film reflects Dewdney's conviction that the projector, not the camera, is the filmmaker's true medium. The form and content of the film are shown to derive directly from the mechanical operation of the projector - specifically the maltese cross movement's animation of the disk and the cross illustrates graphically (pun intended) the projector's essential parts and movements. It also alludes to a dialectic of continuous-discontinuous movements that pervades the apparatus, from its central mechanical operation to the spectator's perception of the film's images... (His) soundtrack demonstrates that what we hear is also built out of continuous-discontinuous 'sub-sets.'