(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, 13 ch; then from 2nd st of hook: 12 sc, 1 sc), 3 sc.
Step 3: turn, 1 ch, 14 sc, (in the same st: 1 ss, 14 ch; then from 2nd st of hook: 13 sc, 1 sc), 1 ss, 1 ch, 11 sc, (in the same st: 1 ss, 15 ch; then from 2nd st of hook: 14 sc, 1 sc, 2 sc ), 1 ss.
Step 4: turn, 1 ch, 18 sc, turn, 1 ch, 18 sc.