Prompt: the last city, all of humanity stacked on top of each other in an endless scramble. an abrupt cliff-like wall of haphazardly stacked container-dwellings, which shifts from time to time to keep up with the strain of its own weight. Above it all, columns of steel and stone rise above the scattered tenements: ancient spires of terrible majesty dominating the urban landscape, between them narrow catwalks and tangled wires bridge dark chasms. A red sun colors everything with rust.