Judith, I think that's a modern variation on Maltese Circle. I'm looking for my copy of the book, but I think there is something very similar in Carolann Palmer's Nifty Ninepatches.
https://www.amazon.com/Ninepatches-P.../dp/B01F9GGXT6
That would have been a book I would not have given away but it is not where it should be... Still looking.