Diagonal spike stitch in crochet cotton thread.

Diagonal Spike Stitch
Multiple of 4 sts + 2
(add 2 for base chain)

Sdc (Spiked double crochet) = yo, insert hook into same place that first dc of previous 3 dc block was worked, yo, draw loop through and up so as not to crush 3dc block, [yo, draw through 2 loops] twice.

1st Row: Skip 3 ch (count as 1 dc), *1 dc into each of next 3ch, skip next ch and work 1Sdc over it instead; rep from * ending 1 dc into last ch, turn.
2nd row: 3 ch (count as 1 dc), skip 1 st, * 1 dc into each of next 3 sts, skip next st and work 1Sdc over it instead; rep from * ending 1 dc into top of tch, turn.
Rep 2nd row.