Shown with a cast-on count of 16 stitches.  

• Rounds 1, 3, 5, 7, 9, 11, 13, 15, and 17: Knit.
• Rounds 2, 6, 14, and 18: Purl.
• Rounds 4 and 16: *Yo, k2tog, repeat from *.
• Round 8: *K1, yo, ssk, k3, k2tog, yo, repeat from *.
• Round 10: *K2, yo, ssk, k1, k2tog, yo, k1, repeat from *.
• Round 12: *K3, yo, sl1-k2tog-psso, yo, k2, repeat from *.
• Repeat rounds 7-18.