Shown with a cast-on count of 24 stitches.  

• Round 1: *[K3, p1] twice, k2, p2tog, repeat from * (multiple of 11 sts).
• Round 2: *[K3, p1] twice, k2, p1, repeat from *.
• Round 3: *[K3, p1] twice, k1, p2tog, repeat from * (multiple of 10 sts).
• Round 4: *[K3, p1] twice, k1, p1, repeat from *.
• Round 5: *[K3, p1] twice, p2tog, repeat from * (multiple of 9 sts).
• Round 6: *K3, p1, k3, p2, repeat from *.
• Round 7: *K3, p1, k3, p2tog, repeat from * (multiple of 8 sts).
• Round 8: *K3, p1, repeat from *.
• Round 9: *K3, p1, k2, p2tog, repeat from * (multiple of 7 sts).
• Round 10: *K3, p1, k2, p1, repeat from *.
• Round 11: *K3, p1, k1, p2tog, repeat from * (multiple of 6 sts).
• Round 12: *K3, p1, p2tog, repeat from * (multiple of 5 sts).
• Round 13: *K3, p2tog, repeat from * (multiple of 4 sts).