Shown with a cast-on count of 16 stitches.  

• Rounds 1-10: *K1, p2, k1, repeat from *.
• Round 11: K2, p1, k1, [k1, p2, k1] twice, k1, p1, k2.
• Round 12: K2, p2, k1, p2, k2, p2, k1, p2, k2.
• Round 13: K3, p4, k2, p4, k3.
• Round 14: K4, p3, k2, p3, k4.
• Round 15: K2, p1, [k2, p2] twice, k2, p1, k2.
• Round 16: K2, p2, k2, p4, k2, p2, k2.
• Round 17: K3, [p2, k2] twice, p2, k3.
• Round 18: [K4, p2] twice, k4.
• Round 19: K5, p2, k2, p2, k5.
• Round 20: K6, p4, k6.
• Round 21: K7, p2, k7.
• Repeat rounds 14-17.