Shown with a cast-on count of 40 stitches.  

• Row 1 (RS): *Yo, ssk, k6, ssk, yo, yo, k2tog, k6, k2tog, yo, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, and 18: Purl.
• Row 3: *K4, yo, k2tog, k8, ssk, yo, k4, repeat from *.
• Row 5: *K3, yo, k2tog, k10, ssk, yo, k3, repeat from *.
• Row 7: *K2, yo, [k2tog] twice, yo, k2tog, yo, yo, k2tog, ssk, yo, yo, ssk, yo, [ssk] twice, yo, k2, repeat from *.
• Row 9: *K1, yo, k2tog, k2, k2tog, yo, k6, yo, ssk, k2, ssk, yo, k1, repeat from *.
• Row 11: *Yo, k2tog, k2, k2tog, k3, yo, k2, yo, k3, ssk, k2, ssk, yo, repeat from *.
• Row 13: *K2tog, k2, yo, k12, yo, k2, ssk, repeat from *.
• Row 15: *K6, yo, [ssk] twice, yo, yo, [k2tog] twice, yo, k6, repeat from *.
• Row 17: *Ssk, yo, yo, ssk, yo, yo, ssk, yo, [ssk] twice, [k2tog] twice, yo, k2tog, yo, yo, k2tog, yo, yo, k2tog, repeat from *.