It is very simple technique. There are multiple ways of crocheting it.
with the crochet can cover and tea light candle cover, I used two slightly different technique.
insert 2 dc in same stitch and skip a stitch and simple repeat
the other way, for a more pronounce V stitch, you skip 2 stitches and dc, ch1, dc in the next stitch.
I'll be posting this technique to my YouTube channel, if you want to check it out.