Describe Willie's attic room.

From the text:

It was a tiny room, shaped rather like a ridge tent. The ceiling sloped downwards at both sides with a straight piece in the center. The wooden floor was covered by two mats. A small bed lay under one of the rafters, and blackouts were pinned on the slanting window beside it. Tom had swept the room clean and had fixed a lamp to a hook on the white plaster ceiling.