(Note: In all chain stitches, work behind the vertical bar.)
Step 1: Start with 19 ch foundation chain, then from 2nd st of hook: 18 sc, turn, 1 ch, 18 sc, turn, 1 ch, 18 sc.
Step 2: Use another yarn, work in the just completed piece: sk 9, work 12 ch, sk 5, 2 ss. Then back to the chain, turn, 2 sc, 2 sc in next st, 1 sc, 1 hdc, (2 hdc in next st)*2 times, 1 sc, 2 sc in next st, 2 sc.
Step 3: sk 1, 2 ss, turn, 5 sc, (2 hdc in next st)*5 times, 5 sc, 1 ss.