Video tutorial here:

 Ch a multiple of 12 plus 1.

Foundation Row: 1 sc in 2nd ch from hook, 1 sc in each ch, turn.

Row 1: Ch 1 (counts as first sc now and throughout), skip first st, 1 sc in each of the next 2 sts, *ch 7, skip next 7 sc, 1 sc in each of the next 5 sc, rep from * across, ending last rep with 1 sc in each of last 3 sc, turn.

Row 2: Ch 1, skip first sc, 1 sc in each of next 2 sc, *ch 7, skip next ch-7 loop, 1 sc in each of the next 5 sc, rep from * across, ending last rep with 1 sc in each of last 2 sc, 1 sc in top of turning ch, turn .

Row 3: Rep Row 2.

Row 4: Ch 1, skip first sc, 1 sc in each of next 2 sc, *ch 3, 1 sc over all 3 ch-7 loops in previous 3 rows, ch 3 (bow tie made), 1 sc in each of the next 5 sc, rep from * across, end last rep 1 sc in each of the last 2 sc, 1 sc in top of turning ch, turn.

Row 5: Ch 1, skip first st, 1 sc in each of the next 2 sc *ch7, skip next bow tie, 1 sc in each of the next 5 sc, rep from * across, ending last rep with 1 sc in each of last 2 sc, 1 sc in top of turning ch, turn.

Rep Rows 2-5 for pattern.