Shown with a cast-on count of 40 stitches.  

• Rounds 1-2 and 20: Purl.
• Round 3: *K1, yo, k8, sl2-k1-p2sso, k8, yo, repeat from *.
• Rounds 4, 6, 8, 10, 12, 14, 16, and 18: Knit.
• Round 5: *K2, yo, k7, sl2-k1-p2sso, k7, yo, k1, repeat from *.
• Round 7: *Sl2-k1-p2sso, yo, k1, yo, k6, sl2-k1-p2sso, k6, yo, k1, yo, repeat from *.
• Round 9: *K4, yo, k5, sl2-k1-p2sso, k5, yo, k3, repeat from *.
• Round 11: *K1, yo, sl2-k1-p2sso, yo, k1, yo, k4, sl2-k1-p2sso, k4, yo, k1, yo, sl2-k1-p2sso, yo, repeat from *.
• Round 13: *K6, yo, k3, sl2-k1-p2sso, k3, yo, k5, repeat from *.
• Round 15: *Sl2-k1-p2sso, yo, k1, yo, sl2-k1-p2sso, yo, k1, yo, k2, sl2-k1-p2sso, k2, yo, k1, yo, sl2-k1-p2sso, yo, k1, yo, repeat from *.
• Round 17: *K8, yo, k1, sl2-k1-p2sso, k1, yo, k7, repeat from *.
• Round 19: *[K1, yo, sl2-k1-p2sso, yo] 5 times, repeat from *.