Knit Purl 25 in the round

PATTERN IN THE ROUND
Cast on a multiple of 6 stitches.
Rounds 1-6: *Knit 3, purl 3, repeat from *.
Rounds 7-12: *Purl 3, knit 3, repeat from *.
Repeat rounds 1-12.

Worked flat, see Knit Purl 25: Elongated Rib Check stitch