With A, ch 15.
Row 1: Sc in 3rd ch from hook (skipped chs count as ch-sp), *ch 1, sk next ch, sc in next ch; rep from * across - 7 sc and 7 ch-sps at the end of this row.
Row 2: Ch 2 (counts as ch-sp), turn, sc in first ch-1 sp, *ch 1, sk next sc, sc in next ch-1 sp; rep from * to last sc, ch 1, sk last sc, sc in beg ch-sp.
Rep Row 2 until piece measures about 33 in. (84 cm) from beg.
Change to B.
With B, rep Row 2 until piece measures about 66 in. (167.5 cm) from beg.
Fasten off. Cut yarn, leaving a long yarn tail.
Hold ends of piece together and join by working sl st through both layers. Weave in ends.