Shown with a cast-on count of 16 stitches.  

• Rounds 1, 3, 7, 15, and 19: Purl.
• Rounds 2, 4, 6, 8, 10, 12, 14, 16, and 18: Knit.
• Rounds 5 and 17: *Yo, k2tog, repeat from *.
• Round 9: *K1, yo, ssk, k3, k2tog, yo, repeat from *.
• Round 11: *K2, yo, ssk, k1, k2tog, yo, k1, repeat from *.
• Round 13: *K3, yo, sl1-k2tog-psso, yo, k2, repeat from *.
• Repeat rounds 8-19.