R1: 4 ch, 3 sc
R2: turn, 1 ch, 2 sc in next st, 1 sc, 2 sc in next st
R3 - R4: turn, 1 ch, 5 sc
R5: turn, 1 ch, 3 sc, 2 ss
R6: turn, 1 ch, sk 1st, 2 ss, 2 sc
R7: turn, 1 ch, 2 sc, 2 ss
R8: turn, 1 ch, 2 ss, 2 sc
R9: turn, 1 ch, sk 1st, 1 sc, 2 ss
R10: turn, 1 ch, sk 1st, 1 ss, 1 sc
R11: turn, 1 ch, 1 sc
R12: 1 ch, work sc a round, then in the tip work 3 ch, 1 ss (picot st)