Human: Create a description of a gloomy scene inside of a medieval tower with an iron staircase and a ceiling. Assistant: 
An openwork iron staircase rises up in a sharp spiral, ascending the levels of this small turret. The outer wall has been painted a dark hue that contains a mottled shading of black with touches of indigo, more like a violent storm than the pinnacle of midnight. Towards the ceiling it fades to a dusky grey.