Simple open O cables on a background of purls, with all left-crossing cables. 11 + 1 stitch repeats
You can see how this can look at CableKnittingStitches
Even number rows: Knit the knit stitches and purl the purl stitches ( = "knit stitches as they lay")
Shown with a cast-on count of 34 stitches.