Skill Level: Beginners.
Yarn : Dk.
Hook: 3mm

Video tutorial here :

Front Post Double Crochet (FPdc): Yo hook, pick up a loop from front, inserting hook from right to left under designated stitch, [yo, draw through 2 loops] 2 times.

Back Post Double Crochet (BPdc): Yo hook, pick up a loop from back, inserting hook from right to left under designated stitch, [yo, draw through 2 loops] 2 times.

Ch a multiple of 6 plus 3.

Foundation Row (WS): [2 dc, ch 1, 2 dc] in 6th ch from hook (shell), * skip next 2 ch, 1 dc in next ch * *, skip next2 ch, work [2 dc, ch 1, 2 dc] in next ch (shell), rep from * across, ending last rep at **, turn.

Row 1: Ch 3 (counts as dc now and throughout), * [2 dc, ch1, 2 dc ] in next ch-1 space, skip next 2 dc of shell, FPdc in next dc, repeat from * across, ending last rep with dc in the top of the turning ch instead of last FPdc, turn.

Row 2: Ch 3, *[2 dc, ch 1, 2 dc] in next ch-1 space, skip next 2 dc of shell, BPdc in next dc, rep from * across ending last rep with dc in the top of the turning ch instead of last BPdc, turn.

Repeat Rows 1 and 2 for pattern.