Shown with a cast-on count of 20 stitches.  

• Rounds 1-4: *K1, yo, k3, k3tog, k3, yo, repeat from *.
• Round 5: *K1, yo, k1, yo, k2, k3tog, k2, yo, k1, yo, repeat from * (multiple of 12 sts).
• Round 6: *K1, yo, k2, yo, k2, k3tog, k2, yo, k2, yo, repeat from * (multiple of 14 sts).
• Round 7: *K1, yo, k1, yo, k2, yo, k2, k3tog, k2, yo, k2, yo, k1, yo, repeat from * (multiple of 18 sts).
• Round 8: *K1, yo, k2, yo, k2, yo, k3, k3tog, k3, yo, k2, yo, k2, yo, repeat from * (multiple of 22 sts).
• Round 9: Knit.