Nice blocks! I did mine this afternoon as a break from my major project...a queen size pp "Compass Roses" top (This afternoon I finished putting together the center, which is about 60" x 60"..pic below).
On Auntie's Puzzle, there is a minor error in the directions. You do make four units of an HST and Color one square, as noted at the beginning of page 2...but two must be as shown and two are in reverse (HST faces a different direction).It will make sense when you put together the top and bottom rows.
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