Shown with a cast-on count of 0 stitches.  

• Row 1 (RS): CO 4 sts (4 sts).
• Row 2: K1, yo, p2, yo, k1 (6 sts).
• Row 3: K6.
• Row 4: K2, yo, purl to last 2 sts, yo, k2 (8 sts).
• Rows 5, 7, 9, 11, 13, 15, and 17: K2, *k1, sl1 wyif, repeat from * to last 2 sts, k2.
• Row 6: K2, yo, purl to last 2 sts, yo, k2 (10 sts).
• Row 8: K2, yo, purl to last 2 sts, yo, k2 (12 sts).
• Row 10: K2, yo, purl to last 2 sts, yo, k2 (14 sts).
• Row 12: K2, yo, purl to last 2 sts, yo, k2 (16 sts).
• Row 14: K2, yo, purl to last 2 sts, yo, k2 (18 sts).
• Row 16: K2, yo, purl to last 2 sts, yo, k2 (20 sts).