http://www.youtube.com/watch?v=33JliXpyiYE
This will work well, if you figure out what size squares you need to make so you can chain sew for the roof/sky, and roof/house squares in this pattern. If you want to pm me later this week, I plan to figure out, by going backwards, to see what size original squares we need to make for this pattern. I'm already working on this pattern.
That link that someone posted is good if you're not chain sewing.