intention is that the 6-team knows that an attack is played over 2 or 4.6 team must anticipate
the midfielder must connect with the right/left forwards to make a block.
the remaining front player must move to the front of the net, the libeo (position 6) defends the block, Position 1 and 5 take position in the backfield.
After some attacking, 3 of them change position and 3 of them swap.