Cast on 38 stitches
Knit first two rows to keep border flat
Knit first 2 and last 2 stitches of every row to keep border flat.
Row 1: Knit
Row 2: K2, purl to last 2, k2
Row 3: K2, (K1, P2) x 11 times, K3
Row 4: K2, (P1, K2) x 12 times
Repeat above 3 rows to desired size. Finish by knitting 3 rows.