Shown with a cast-on count of 16 stitches.  

• Round 1: P2, k1, p2, k9, p2.
• Round 2: P2, k1, p2, ssk, k7, p2 (15 sts).
• Round 3: P2, k1, p2, k8, p2.
• Round 4: P2, yo, k1, yo, p2, ssk, k6, p2 (16 sts).
• Round 5: P2, k3, p2, ssk, k5, p2 (15 sts).
• Round 6: P2, k1, yo, k1, yo, k1, p2, ssk, k4, p2 (16 sts).
• Round 7: P2, k5, p2, ssk, k3, p2 (15 sts).
• Round 8: P2, k2, yo, k1, yo, k2, p2, ssk, k2, p2 (16 sts).
• Round 9: P2, k7, p2, ssk, k1, p2 (15 sts).
• Round 10: P2, k3, yo, k1, yo, k3, p2, ssk, k0, p2 (16 sts).
• Round 11: P2, k9, p2, k1, p2.
• Round 12: P2, k7, k2tog, p2, k1, p2 (15 sts).
• Round 13: P2, k8, p2, k1, p2.
• Round 14: P2, k6, k2tog, p2, yo, k1, yo, p2 (16 sts).
• Round 15: P2, k5, k2tog, p2, k3, p2 (15 sts).
• Round 16: P2, k4, k2tog, p2, k1, yo, k1, yo, k1, p2 (16 sts).
• Round 17: P2, k3, k2tog, p2, k5, p2 (15 sts).
• Round 18: P2, k2, k2tog, p2, k2, yo, k1, yo, k2, p2 (16 sts).
• Round 19: P2, k1, k2tog, p2, k7, p2 (15 sts).
• Round 20: P2, k0, k2tog, p2, k3, yo, k1, yo, k3, p2 (16 sts).
• Repeat rounds 1-20.