Shown with a cast-on count of 32 stitches.  

• Rounds 1-2 and 11-12: *P2, k13, repeat from * to last 2 sts, p2.
• Round 3: *P2, k10, ssk, yo, k1, repeat from * to last 2 sts, p2.
• Round 4: *P2, k9, ssk, k2, yo, repeat from * to last 2 sts, p2.
• Round 5: *P2, k8, ssk, k1, yo, k2, repeat from * to last 2 sts, p2.
• Round 6: *P2, k7, ssk, k3, yo, k1, repeat from * to last 2 sts, p2.
• Round 7: *P2, k6, ssk, k2, yo, k3, repeat from * to last 2 sts, p2.
• Round 8: *P2, k5, ssk, k4, yo, k2, repeat from * to last 2 sts, p2.
• Round 9: *P2, k4, ssk, k3, yo, k4, repeat from * to last 2 sts, p2.
• Round 10: *P2, k3, ssk, k5, yo, k3, repeat from * to last 2 sts, p2.
• Round 13: *P2, k1, yo, k2tog, k10, repeat from * to last 2 sts, p2.
• Round 14: *P2, yo, k2, k2tog, k9, repeat from * to last 2 sts, p2.
• Round 15: *P2, k2, yo, k1, k2tog, k8, repeat from * to last 2 sts, p2.
• Round 16: *P2, k1, yo, k3, k2tog, k7, repeat from * to last 2 sts, p2.
• Round 17: *P2, k3, yo, k2, k2tog, k6, repeat from * to last 2 sts, p2.
• Round 18: *P2, k2, yo, k4, k2tog, k5, repeat from * to last 2 sts, p2.
• Round 19: *P2, k4, yo, k3, k2tog, k4, repeat from * to last 2 sts, p2.
• Round 20: *P2, k3, yo, k5, k2tog, k3, repeat from * to last 2 sts, p2.