Start: chain a multiple of 7 sts
Row 1: 2dc into 3rd st from hook, *sk 3ch, 1sc into next ch, 3ch, 1dc into each of next 3ch.** Rep from * to ** across to end. Last 4ch, sk 3ch, 1sc into last ch. 3ch, turn.
Row 2: 2dc into first sc. *Sk 3dc, 1sc into first of 3ch, 1dc into each of next 2ch, 1dc into next sc**. Rep from * to ** across to end. Sk last 2dc, 1sc into top of last st. 3ch, turn.
Row 3: repeat row 2 till desired size is reached.