We have two blocks. Lets call them A and B. Block A is above B. Block A has two medium black squares. Medium black square number one is below a medium blue square. Medium black square number two is below the medium blue square. Below the medium black square number two there is medium black square number one. Block B has two medium blue squares. Medium blue square number one is touching the bottom edge of this block. This object is below medium blue square number two.
Which object is above a medium blue square? the medium blue square that is in block A or the object which is touching the bottom edge of a block?
the medium blue square  that is in block A the object which is touching the bottom edge of a block  both of them none of them