Ridged chevron stitch in crochet cotton.

Ridged Chevron Stitch
Multiple of 12 sts
(add 3 for base chain)

1st Row: Skip 3 ch (count as 1 dc), 1 dc into next ch, * 1 dc into each of next 3 ch, [over next 2 ch work dc2tog] twice, 1 dc into each of next 3 ch, [2 dc into next ch] twice; rep from * ending last rep with 2 dc once only into last ch, turn.
2nd Row: 3 ch (count as 1 dc), 1 dc into first st, always inserting hook into back loop only of each st, * 1 dc into each of next 3 sts, [over next 2 sts work dc2tog] twice, 1 dc into each of next 3 sts, [2 dc into next st] twice; rep from * ending last rep with 2 dc once only into top of tch, turn.
Rep 2nd Row.