Crochet Hook: 10mm [US N-15].
With A, ch 69.
Row 1 (RS): Work [2 dc, ch 1, dc] in 4th ch from hook, *skip 3 ch, [3 dc, ch 1, dc] in next ch; repeat from * across, dc in last ch, turn.
Row 2: Ch 3, work [2 dc, ch 1, dc] in rst ch-1 space, *[3 dc, ch 1, dc] in next ch-1 space; repeat from * across, dc in beginning ch, turn – 16 pattern repeats.
Repeat Row 2 twice more.
[Change to B and work 2 rows. Change to A and work 4 rows] 4 times for Stripe Pattern, ending with 4th row of A. Do not fasten off, turn.
Next Row: Ch 1, sc in rst dc, ch 1, sc in next ch-1 space, *ch 3, sc in next ch-1 space; repeat from * across, end with ch 3, sc in beginning ch.
Border: With right side facing and B, join yarn in any ch-3 space, ch 1, [(sc, ch 2) twice, sc] in same space, *[(sc, ch 2) twice, sc] in each ch-3 space around, working [sc, ch 3, sc] in each corner, slip st to rst sc to join.
Weave in ends.