Knit Purl 36 in the round

PATTERN IN THE ROUND
Cast on any number of stitches.
Round 1: Color A, knit.
Round 2: Color A, purl.
Round 3: Change to color B, knit.
Round 4: Color B, purl.
Round 5: Change to color C, knit.
Round 6: Color C, purl.
Repeat rounds 1-6.

Worked flat, see Knit Purl 36: Garter Stripes stitch