Well--I'd prefer five, but I can't find a 5th fabric that matches the focus fabric well enough for me, and I want to use the four I do have... so that's the issue. I always shoot for 3 or 5, but in this case.... :roll:
I would think that as long as the striped block ends up being the same width as the "focus" block ~ any number of strips could be used.
That's kind of what I was thinking...