Project Blanket - Square #1 - Basket Rib Stitch

Pattern Instruction 
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Multiple of 2 +1

Row 1 (right side): Knit.
Row 2: Purl.
Row 3: K1, *sl wyib, K1; rep from * to end.
Row 4: K1, *sl 1 wyif, K1; rep from * to end.

Repeat these 4 rows.