Shown with a cast-on count of 100 stitches.  

• Rounds 1-2: [K3, p1] 25 times.
• Round 3: *[K3, p1] 4 times, k2, p2tog, repeat from * (95 sts).
• Round 4: *[K3, p1] 4 times, k1, p2tog, repeat from * (90 sts).
• Round 5: *[K3, p1] 4 times, p2tog, repeat from * (85 sts).
• Round 6: *[K3, p1] 3 times, k3, p2tog, repeat from * (80 sts).
• Round 7: *[K3, p1] 3 times, k2, p2tog, repeat from * (75 sts).
• Round 8: *[K3, p1] 3 times, k1, p2tog, repeat from * (70 sts).
• Round 9: *[K3, p1] 3 times, p2tog, repeat from * (65 sts).
• Round 10: *[K3, p1] twice, k3, p2tog, repeat from * (60 sts).
• Round 11: *[K3, p1] twice, k2, p2tog, repeat from * (55 sts).
• Round 12: *[K3, p1] twice, k1, p2tog, repeat from * (50 sts).
• Round 13: *[K3, p1] twice, p2tog, repeat from * (45 sts).
• Round 14: *K3, p1, k3, p2tog, repeat from * (40 sts).
• Round 15: *K3, p1, k2, p2tog, repeat from * (35 sts).
• Round 16: *K3, p1, k1, p2tog, repeat from * (30 sts).
• Round 17: *K3, p1, p2tog, repeat from * (25 sts).
• Round 18: *K3, k2tog, repeat from * (20 sts).
• Round 19: *K2, k2tog, repeat from * (15 sts).
• Round 20: *K1, k2tog, repeat from * (10 sts).