Irish, no not card trick I don't think, but sorta I guess. Anyway, I had seen a picture of the blocks done as an octagon and used as a mat but had no idea of the size. But by analyzing it, I made a pattern for a block and went from there.
No promises on another mystery. I put myself under the gun when I announced a starting date, then felt I had to live up to it. So, next time a fabulous new idea comes to me, I'll start another mystery. But no idea when.
This has been fun, though, so I am sure that some day, some time, I will try another one.