English:
1. row: (chain) 4 - 4 - 4 - 4
2. row: (chain for turning) 4 - 4 - 4 - 4 - 4 join in the last picot of the previous row
(chain) 4 - 4 - 4 - 4 join in middle picot of the according chain in the previous row
all other rows: 4 - 4 - 4 - 4 - 4 join in middle picot of the according chain in the previous row
4 - 4 - 4 - 4 - || -
4 - 4 - 4 - 4 - || -