We have two blocks, A and B. Block A is above B. Block A contains a medium yellow square and a medium blue square. Below the medium yellow square and the medium blue square there is a medium black square. Below the medium blue square there is the medium yellow square. Block B has a medium black square and a medium blue square. Below the medium blue square is the medium black square.
What is below the yellow shape? a medium blue square that is in block B or a medium blue square that is in block A?
medium blue square  that is in block B medium blue square  that is in block A both of them none of them