Human: Produce a detailed written description of a secluded scene inside a passage hallway with stone, grille, lichen, and a door. Assistant: 
Faint light leaks through the slatted grille of a heavy wooden door, mainly coming from lightly glowing red lichen that covers damp stone ceiling and disappear into the surrounding darkness. Narrow runnels of murky water trickle through the area, echoing hollowly through the stone and steel corridor.