Three blocks, named AAA, BBB and CCC exist in the image. A medium yellow square is inside and touching and a medium blue thing is within block AAA. The blue shape touches the medium yellow square. Block BBB is under block AAA. Over another medium black square there is a medium black square. Medium black square number one is inside block BBB. Block BBB covers medium black square number two. Block AAA is inside and touching block CCC. A medium yellow square is in and a medium black square is inside and touching block CCC. The medium yellow square is over the medium black square.
Are all blocks over any block?