Human: Generate for me a foreboding scene inside a prison with an iron grate, door, and portcullis. Assistant: 
Dim light flickers in from an iron grate in the ceiling above, a grim reminder that guards can watch, and unleash a rain of bolts, from the rooftop. A reinforced door guards the way out to the west, while a portcullis to the east can be raised or lowered to hold new arrivals until it is time for them to be escorted to their final destinations.