Chain in multiples of 3 + 6 chains.
Row 1: Work dc in fourth ch from hook (skipped ch's count as first dc), skip 1 ch, *[dc ch1 dc in next chain skip 2ch's], repeat from * to last 2ch's and 1dc in each.
Row 2: Your turning chain counts as your first dc in the row. dc in next dc, ch1 work v stitch in each V stitch accross the row to last 3 ch's, skip next ch, 1dc in each of last 2 dc's.
Repeat row 2 for pattern.