Row 1 and all wrong side rows: Purl all sts.
Row 2 - Right side: K1, * sl 3 wyif, k1; rep from * to end.
Row 4: K1, * sl 3 wyif, k1; rep from * to end.
Row 6: K2, * k1 uls, k3; rep from * to last 3 sts, k1 uls, k2.
Row 8: K3, * sl 3 wyif, k1; rep from * to last 2 sts, k2.
Row 10: K3, * sl 3 wyif, k1; rep from * to last 2, k2.
Row 12: K4, * k1 uls, k3; rep from * to last st, k1.
Knitting abbreviations:
K: Knit | P: Purl: P | SL wyif: Slip stitch purlwise with yarn in front
K1 uls: Knit 1 under loose strands - Insert needle under the loose strands and knit the next stitch.