Chain multiple: 5+4

Two colors: color A and color B

Stitch Guide

Shell: Work 3 dc in specified st: shell made.

Front-post single crochet (FPsc): Insert hook from front to back to front around post (vertical bar) of specified st and draw up a lp; YO and draw through 2 lps: FPsc made.

Instructions

Work beg ch with color A.

Row 1 (RS): With color A, dc in 4th ch from hook, dc in next ch; *sk 2 chs, dc in next ch, shell in next ch, dc in next ch; rep from * across to last 2 chs, dc in next ch, 2 dc in last ch; finish off color A; do not ch or turn.

Row 2 (RS): With right side facing you, join color B with sc in top of turning ch at right of prev row, sc in next dc; *ch 3, sk next 2 dc, sc in first dc of next shell, FPsc around next dc, sc in next dc; rep from * across, ending last rep with ch 3, sk 2 dc, sc in last 2 dc; finish off color B; join color A and ch 3, turn.

Row 3 (WS): *With color A, work 5 dc in next ch-3 sp; rep from * across, ending last rep with dc in last sc; finish off color A, join color B; ch 1, turn.

Row 4 (RS): Sc in top of first dc of prev row, ch 1, sk first dc of next shell; *sc in next dc, FPsc around next dc, sc in next dc**, ch 3, sk next 2 dc; rep from * across, ending last rep at **; ch 1, sc in top of turning ch; finish off color B, join color A; ch 3, turn.

Row 5 (WS): Work 2 dc in base of ch; *5 dc in ch-3 sp; rep from * across ending last rep with dc in last sc; finish off color A, join color B, ch 1, turn. 

Row 6 (RS): Sc in top of turning ch, sc in next dc; *ch 3, sk next 2 dc, sc in first dc of next shell; FPsc around next dc, sc in next dc; rep from * across, ending last rep with ch 3, sk 2 dc, sc in last 2 dc; finish off color B, join color A; ch 1, turn.

Rep rows 3-6 for patt.