Islamic Tile Patterns, revisited

Here’s a painting of mine from when my oldest was little and naptime was sacred art making time.  This lasted until my second child decided to never, ever nap at the same time as her sister.

Here’s a detail, in which you can see the handwritten text beneath the paint.  The real point, though, is the Islamic tile pattern in the background, from Granada I believe.  I found the pattern on the internet today here:

And finally, here is the bare bones beginning of a sketch:

I love this pattern but it needs some work.  The six pointed stars are tricky.  There must be a way to graph out the pattern and make the whole thing easier to render.  Of course there are other ways to transfer a pattern, but I wanted to get it into my fingers, if you know what I mean, so that I could duplicate at will.