2 color knitting
I have not knitted with 2 colors before, and I found this pattern that I liked, it is called a "Star Stich" and I have done it with one color but need help starting it with two.
Row 1 (WS): With Color A, purl
Row 2: With A, k2, *yo, k3, pass first of the 3 knit sts over the 2nd and 3rd sts; rep from *, end k1
Row 3: With Color B, purl
Row 4: With B, k1, *k3, pass first of the 3 knit sts over the 2nd and 3rd sts, yo; rep from *, end k2
Repeat rows 1-4.
Do I cast on with both colors? If not, how do you add it in? Thanks for you help in advance!