R1: work 4ch, then from 2nd st of hook: 2 sc, 5 sc in the same st, 2 sc.
R2: work back loops only (BLO): 1 ch, turn, 4 sc, 3 sc in the same st, 4 sc.
R3-9: BLO: turn, 1 ch, sc2tog, 3 sc, 3 sc in one st, 3 sc, sc2tog.
R10: BLO: turn, 1 ch, (sc2tog)*2 times, 1 sc, 3 sc in one st, 1 sc, (sc2tog)*2 times.
R11-12: BLO: turn, 1 ch, sc2tog, 2 sc, 3 sc in one st, 2 sc, sc2tog.
R13: BLO: turn, 1 ch, (sc2tog)*2 times, 3 sc in one st , (sc2tog)*2 times.
R14-16: BLO: turn, 1 ch, sc2tog, 1 sc, 3 sc in one st, 1 sc, sc2tog.