Shown with a cast-on count of 40 stitches.  

• Rows 1 and 3 (RS): *K20, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, and 26: Purl.
• Row 5: *K6, yo, k2tog, k4, ssk, yo, k6, repeat from *.
• Row 7: *K4, ssk, yo, k1, yo, k2tog, k2, ssk, yo, k1, yo, k2tog, k4, repeat from *.
• Row 9: *K3, ssk, yo, k3, yo, k2tog, ssk, yo, k3, yo, k2tog, k3, repeat from *.
• Row 11: *K2, ssk, yo, k5, yo, k2tog, k5, yo, k2tog, k2, repeat from *.
• Row 13: *K2, yo, ssk, k6, yo, k2tog, k5, yo, k2tog, k1, repeat from *.
• Rows 15 and 17: *K2, yo, ssk, k3, k2tog, yo, k2, yo, k2tog, k4, yo, k2tog, k1, repeat from *.
• Row 19: *K2, yo, ssk, k4, k2tog, yo, k7, yo, k2tog, k1, repeat from *.
• Row 21: *K2, k2tog, yo, k5, k2tog, yo, k5, yo, ssk, k2, repeat from *.
• Row 23: *K3, k2tog, yo, k3, yo, ssk, k2tog, yo, k3, yo, ssk, k3, repeat from *.
• Row 25: *K4, k2tog, yo, k1, yo, ssk, k1, k1, k2tog, yo, k1, yo, ssk, k1, k1, k1, k1, repeat from *.
• Row 27: *K6, yo, ssk, k4, k2tog, yo, k6, repeat from *.