With C, ch 9.
Row 1: Work (2 dc, ch 3, 2 dc) in 6th ch from hook, skip next 2 ch, dc in last ch, turn.
Rows 2-85: Ch 3 (counts as first dc), skip next 2 dc, (2 dc, ch 3, 2 dc) in ch-3 space, skip next 2 dc, dc in top of beginning ch, turn.
Work Side Border along each long edge of each Strip.
With right side facing, join A in last st to work along one long edge of each Strip.
Row 1: Ch 1, 2 sc in first row, [ch 1, sc] in each row to last row, 2 sc in last row, turn.
Row 2: Ch 1, sc in each of first 2 sc, *ch 1, skip next ch-1 space, sc in next sc; repeat from * across to last sc, sc in last sc.
Work Strip Border around each Strip.
With right side facing, join B in beginning st to work along one long edge of each Strip.
Rnd 1: Ch 1, sc in first 2 sc, *[work 2 hdc in each corresponding ch-1 space 2 rows below (Row 1 of Side Border) pulling st up to current level] across to last 2 sc, sc in last 2 sc, ch 2, 2 sc in edge of Row 2 of Side Border, 2 sc in edge of Row 1 of Side Border, turn to work along short end of Strip, skip next 2 dc, 2 sc in next ch-3 space, skip next 2 dc, turn to work along opposite long edge of Strip, 2 sc in edge of Row 1 of Side Border, 2 sc in edge of Row 2 of Side Border, ch 2; repeat from *, join with a slip st to beginning sc.
With right side facing and holding 2 Strips together along long edges, join B in one corner with a slip st.
Row 1: Working in back loops only and working through sts of both Strips, slip st across to opposite corner to join Strip together.
Repeat to join all Strips.
With right side facing, join B in top right-hand corner ch-2 space with a slip st.
Rnd 1: Ch 3 (counts as first dc), 2 dc in corner ch-2 space, dc in each st and each ch-space around, working 3 dc in each corner ch-2 space, join with a slip st to beginning ch.
Rnd 2: Ch 1, sc in first 2 sts, (ch 3, slip st in last ch for picot), *sc in next 2 sts, (ch 3, slip st in last ch); repeat from * around, join with a slip st to beginning sc. Fasten off.
Weave in ends.
ABBREVIATIONS: A= Color A; B= Color B; C= Color C;
ch= chain; dc= double crochet; hdc= half double
crochet; mm= millimeters; rnd= round; sc= single
crochet; st(s)= stitch(es); *= repeat whatever follows the *
as indicated; = work directions in brackets the number of