Colors A and B.
Repeat rows 1 - 4.
Row #SideColorBegin RowRepeatRepeat From *End Row
1WA*purl* 
2RBk1*sl 1 wyib, k1* 
3WASlip all stitches to the other end of the needle*knit* 
4RBp2*sl 1 wyif, p1 *p1; slip all stitches to the other end of the needle.
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