human
Create a detailed description of a mysterious scene outside town with moons.
assistant
Palm-sized moons of some black substance have been pressed into the walls of the city at regular two-foot intervals, creating a geometric pattern that nicely offsets the glittering crystal. How the moons remain fixed in the extremely hard material is a mystery, and judging by the small chips and scrapes that edge some of them, a mystery as yet to be solved by petty pilferers.