Shown with a cast-on count of 37 stitches.  

• Row 1 (RS): K1, *yo, k1, [p3, k1] 4 times, yo, k1, repeat from * (multiple of 20 sts, plus 1).
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Row 3: K1, *k1, yo, k1, [p3, k1] 4 times, yo, k2, repeat from * (multiple of 22 sts, plus 1).
• Row 5: K1, *k2, yo, k1, [p3, k1] 4 times, yo, k3, repeat from * (multiple of 24 sts, plus 1).
• Row 7: K1, *k3, yo, k1, [p2tog, p1, k1] 4 times, yo, k4, repeat from * (multiple of 22 sts, plus 1).
• Row 9: K1, *k4, yo, k1, [p2tog, k1] 4 times, yo, k5, repeat from * (multiple of 20 sts, plus 1).
• Row 11: K1, *k5, yo, k1, [sl2-k1-p2sso, k1] twice, yo, k6, repeat from * (multiple of 18 sts, plus 1).