This stitch is knitted in a multiple of four stitches plus one and begins with a wrong side row.

Techniques used:
Knit: K
Purl: P
Slip stitch as if to purl: Sl
With yarn in front: Wyif
With yarn in back: Wyib
Knit 1 under loose strand: K1 uls.
How to: K1 uls
– Insert right needle under loose strand and then into next stitch knitwise, from front to back. Knit stitch normally then bring new stitch out from under the strand.

With color A, Cast on:  multiple of 4 sts + 1
Row 1 : With color A, purl all sts.
Row 2 (Right side): With color A, knit all sts. 
Row 3: With color A, * p1, sl 3 wyib; repeat from * to last st, p1.
Row 4: With color B, * sl1 wyib, k3; repeat from * to last st, sl 1 wyib
Row 5: With color B, * sl1 wyif, p3; repeat from * to last st, sl1 wyif
Row 6: With color B, * sl1 wyib, k3; repeat from * to last st, sl 1 wyib
Row 7: With color B, * sl1 wyif, p3; repeat from * to last st, sl1 wyif
Row 8: With color A, * k2, k1 uls, k1; repeat from * to last st, k1
Row 9: With color A, p2, * p1, sl 3 wyib; repeat from * to last 3 sts, p3
Row 10: With color B, k2, * sl1 wyib, k3; repeat from * to last 3 sts, sl1 wyib, k2.
Row 11: With color B, p2, * sl1 wyif, p3; repeat from * to last 3 sts, sl1 wyif, p2.
Row 12: With color B, k2, * sl1 wyib, k3; repeat from * to last 3 sts, sl1 wyib, k2.
Row 13: With color B, p2, * sl1 wyif, p3; repeat from * to last 3 sts, sl1 wyif, p2.
Row 14: With color A, k2, * k2, k1 uls, k1; repeat from * to last 3 sts, k3.
Repeat rows 3-14 until you have reached your desired length.