Shown with a cast-on count of 37 stitches.  

• Rows 1 and 11 (WS): *K2, p3, k3, p3, k1, repeat from * to last st, k1.
• Rows 2, 6, and 10: *P2, k3, yo, p3tog, yo, k3, p1, repeat from * to last st, k1.
• Rows 3, 5, 7, and 9: *K2, p9, k1, repeat from * to last st, k1.
• Rows 4 and 8: *P2, k1, ssk, yo, k3, yo, k2tog, k1, p1, repeat from * to last st, k1.
• Row 12: P2tog, yo, k3, p2, *p1, k3, yo, p3tog, yo, k3, p2, repeat from * to last 6 sts, p1, k3, yo, p2tog.
• Rows 13, 15, 17, and 19: P5, k1, *k2, p9, k1, repeat from * to last 7 sts, k2, p5.
• Rows 14 and 18: K2, yo, k2tog, k1, p2, *p1, k1, ssk, yo, k3, yo, k2tog, k1, p2, repeat from * to last 6 sts, p1, k1, ssk, yo, k2.
• Rows 16 and 20: Ssk, yo, k3, p2, *p1, k3, yo, sl1-k2tog-psso, yo, k3, p2, repeat from * to last 6 sts, p1, k3, yo, ssk.