Hey Rachel,
Do you mean like this:
http://www.windsweptquilters.com/ima...ling_Block.gif
There's this one on YouTube:
http://www.youtube.com/watch?v=DWpSETMbws4 which shows how to strip piece them. That's how I would do it. Otherwise I've seen them done all with HST, but I don't remember how. It as at our Guild a few years ago.
Hope this helps!