Shown with a cast-on count of 13 stitches.  

• Rounds 1-2 and 14: P6, k1, p6.
• Round 3: P6, 1-to-7 inc, p6 (19 sts).
• Round 4: P6, k7, p6.
• Round 5: P5, k2tog, k2, yo, k1, yo, k2, ssk, p5.
• Round 6: P5, k3, k1 tbl, k1, k1 tbl, k3, p5.
• Round 7: P4, k2tog, k2, yo, p1, k1, p1, yo, k2, ssk, p4.
• Round 8: P4, k3, k1 tbl, p1, k1, p1, k1 tbl, k3, p4.
• Round 9: P3, k2tog, k2, yo, p2, k1, p2, yo, k2, ssk, p3.
• Round 10: P3, k3, k1 tbl, p2, k1, p2, k1 tbl, k3, p3.
• Round 11: P2, k2tog, k2tog, p3, k1, p3, ssk, ssk, p2 (15 sts).
• Round 12: P2, k2, p7, k2, p2.
• Round 13: P2, k2tog, p3, k1, p3, ssk, p2 (13 sts).
• Rounds 15 and 19: P6, MB, p6.
• Rounds 16, 18, and 20: P13.
• Round 17: P5, MB, p1, MB, p5.