Color A, cast on a multiple of 6, + 3 sts.
Row 1 – RS: Color A, knit.
Row 2: Color A, purl.
Row 3: Color B, k4, * s1 1 wyib,  k5; rep from * to last 5 sts, sl 1 wyib, k4.
Row 4: Color B, k4, * sl 1 wyif, k5; rep from * to last 5 sts, sl 1 wyif, k4.
Row 5: Color B, p4, * sl 1 wyib,  p5; rep from * to last 5 sts, sl 1 wyib, p4.
Row 6: Color B, k4, * sl 1 wyif, k5; rep from * to last 5 sts, sl 1 wyif, k4.
Row 7: Color A, knit.
Row 8: Color A, purl.
Row 9: Color B, k1, * sl 1 wyib, k5; rep from * to last 2 sts, sl 1 wyib, k1.
Row 10: Color B, k1, * sl 1 wyif, k5; rep from * to last 2 sts, sl 1 wyif, k1.
Row 11: Color B, p1, * sl 1 wyib,  p5; rep from * to last 2 sts, sl 1 wyib, p1.
Row 12: Color B, k1, * sl 1 wyif, k5; rep from * to last 2 sts, sl 1 wyif, k1.
Repeat Rows 1 – 12 until desired length is reached finishing with rows 1 and 2.