A metal plate with a pattern of holes and a central circular opening is held in place by four screws within a dark, enclosed chamber. A thin, pointed tool enters from the right side of the frame and moves toward the center of the plate, making contact with the surface near the circular opening. The tool then begins to move in a circular motion, creating a dark, curved line on the plate's surface. The tool continues to move in a circular path, gradually forming a complete, dark ring around the central opening. The tool then moves away from the plate, exiting the frame to the right. The plate re
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