Colors A and B.
Cast on with Color A and knit one row.
Repeat Rows 1 - 6

Row #SideColorBegin RowRepeatRepeat From *
1RBp1*yo, sl 1 wyib, p1*
2WBk1*yo; slip the slipped stitch and the yo of the previous row together with yarn in back; k1*
3RAp1*k3 tog, p1*
4WAk1*yo, sl 1 wyib, k1*
5RAp1*yo; slip the slipped stitch and the yo of the previous row together with yarn in back; p1*
6WAk1*p3 tog, k1*