You should really check out this page, from the website of Northern Star Originals, a co-op that makes them.
It's whatever you want it to be. I made it for fun, and I hope it comes in handy for anyone who wants to make their own star blanket designs.
Star blankets can have significant spiritual meaning for their owners. The design you export from this site has no more significance than a string of ones and zeroes. It's up to you as to what you do with the design, and I urge you to be respectful.