I am definitely not an expert, but it looks like just 4 basic blocks of the same design joined together with a pink border. The block looks like a type of modified log cabin, courthouse steps or something like that, but corners are pieced of a square and 2 triangles, then placed face down on the corner (on 2 blocks upper left and lower right and on 2 upper right and lower left) and flipped back. When the bigger blocks are joined it gives the illusion of a separately piced center one. I guess this is all as clear as mud, but I don't know how else to explain it.