the nasa spacecraft's main engine.

Prompt 1: a large, mechanical clock in the center of a room with gears and parts visible on the outside. the clock has a round face with hour and minute hands, and it appears to be functioning.

Prompt 2: a large, mechanical clock in a white room with visible gears and parts. the clock has a round face with hour and minute hands, and it appears to be functioning. the surrounding area is made of wood or metal, with some visible details like bolts or screws.