Shell pattern in crochet cotton thread.
Shell (2 dc, ch 1, 2 dc)
Ch a multiple of 4 sts
Row 1 shell in 4th ch from hook, *skip 3 ch, shell in next ch; rep from * to end. Turn.
Row 2 Ch 3, *shell in ch-1 sp of next shell; rep from * to end. Turn. Rep row 2.