human
Please generate a foreboding scene inside a medieval keep with an arch and a catwalk.
assistant
This gatehouse is immensely solid, thirty feet square at least, with walls a foot thick. Its inner and outer doors are each framed by a twelve-foot arch. Overhead, the two-story structure is furnished with small slits of windows and a catwalk shielded with slotted walls for archers to use as cover.