(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, 3 ss, 15 sc, turn, 1 ch, 14 sc.
Step 2: (in the same st: 1 ss, 14 ch, then from 2nd st of hook: 13 sc, 1 sc ), 3 sc.
Step 3: turn, 1 ch, 14 sc, (in the same st: 1 ss, 15 ch, then from 2nd st of hook: 14 sc, 1 sc), 1 sc, 2 sc in next st.
Step 4: turn, 1 ch, 18 sc, turn, 1 ch, 18 sc.