Works on an even number of stitches.
Row 1 (right side): Knit.
Row 2: *Knit 1, purl 1. Repeat from * across.
Row 3: Knit.
Row 4: *Purl 1, knit 1. Repeat from * across.
Repeat four rows for pattern.
The wrong side of this stitch, where the purls are prevalent, is known as Sand Stitch.