Originally Posted by
dunster
What you're showing is a simplified version of a quarter square triangle (QST). Follow the normal directions for making a QST, but halfway through, where you would be placing two HST's together, replace one of them with a plain piece of fabric. You'll wind up with two of the blocks that you want. (At least I think that's what you get. It's been a while since I did it.)
I think if you do it this way 2 of your blocks spin one way and 2 spin the other way. That doesn't matter for some patterns, but it will if you're making pinwheels. In that case I'd make 8 u it's and have 2 blocks.
Ok now that I read it again I see that's what Dunster was saying.