This is the reverse side of G12 (Variation 2) hopefully you can see how I constructed this block from the picture. I paper foundation pieced the outside making a frame which included the points of the star which are at 12,3,6 and 9 o’clock, then I reverse appliqued the other star (points facing to the corners).
It was a bit tricky making the frame as I had to make the 4 corner triangles (2 pieces) then the 4 sides (4 pieces) then attach part of the side to the triangle, making sure not to sew into the seam allowance of the side piece, then I pressed the seam allowance under, pinned a square of the fabric to cover the gap, flipped it over and attached it. I sewed the points first to keep it even, then the remainder.
I hope this makes sense, maybe I should have made little tags to point to the relevant part.