on the wall there was a tiny little crack. if u paid enough attention, it will be spotted. but similar walls were everywhere, and the walls just keep getting taller so that they can feel the wind and that so other walls will not block them. it ended up with every single wall becoming taller and taller, constantly being blocked by other walls and blocking other walls - yet they are essentially still the very same wall (with cracks) that conceal but doesn't protects. what strange walls! what dark cloth it was covered with!