human
Write a detailed description of a spooky marsh setting with a pathway, rivulet, fog, and reeds.
assistant
The pathway is like a valley between the tall fuzzy-headed reeds and rushes. Water trickles softly in some rivulet hidden by the reeds. Overhead, the fog coils and distends in the pale moonlight with a snakelike motion. The foul reek of swamp gas pervades the area.