If you were to play this film in a projector, all you would see is the lightsaber blades moving on a black background. On this film, each animation cel is placed over a black background and shot with a light diffuser over the lens (this diffuser gives the lightsabers the glow they have around the edges). The cels are clear everywhere except where the lightsaber blade is seen in each frame. Eventually the artist has a stack of these cels, one for each frame of the movie containing a lightsaber. Then, for each frame, the artist paints in the correct color for the blade using a bright cartoon color. The special effects artist draws the outline of each lightsaber blade in the frame onto the cel. The artist looks at the film frame by frame, and projects each frame that contains a lightsaber onto a clear piece of plastic (an animation cel). A special effects artist now has the job of making those broomsticks look real.
In this film, the actors look like they are fighting with painted broomsticks instead of lightsabers. After the film is shot, it is taken to the special effects department.
