Shown with a cast-on count of 40 stitches.  

• Row 1 (RS): *K2, yo, k4, [ssk] twice, k3, yo, k7, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Row 3: *K1, yo, k3, [ssk] 5 times, yo, k3, yo, k1, yo, yo, k2, repeat from *.
• Row 5: *K4, yo, k1, yo, yo, ssk, ssk, ssk, k9, repeat from *.
• Row 7: *K8, yo, [ssk] 3 times, k1, yo, k5, yo, repeat from *.
• Row 9: *Yo, k2, yo, k1, yo, k3, yo, [ssk] 5 times, yo, k1, ssk, yo, k1, repeat from *.
• Row 11: *Yo, k2, yo, k1, yo, k3, yo, [k2tog] 5 times, yo, k1, k2tog, yo, k1, repeat from *.
• Row 13: *K8, yo, [k2tog] 3 times, k1, yo, k5, yo, repeat from *.
• Row 15: *K4, yo, k1, yo, yo, k2tog, k2tog, k2tog, k9, repeat from *.
• Row 17: *K1, yo, k3, [k2tog] 5 times, yo, k3, yo, k1, yo, yo, k2, repeat from *.
• Row 19: *K2, yo, k4, [k2tog] twice, k3, yo, k7, repeat from *.