If you have two sets of each block, I think it is the top and bottom row of a 7 row block
Row 2 & 6: HST, a color chisel, a block like the 1st row center-A, a different square-B, block A, a color chisel, an HST
Row 3 & 5: square same color as chisel-D, A, B, C, B, A, D
Row 4 (middle) A, B, C, new center block, C, B, A
It's like a mini trip around the world, with the corners cut off.
Anyone with EQ follow me? Want to draw it?