Shown with a cast-on count of 40 stitches.  

• Row 1 (RS): *K8, k2tog, yo, yo, ssk, k8, repeat from *.
• Rows 2, 4, 6, 8, and 10: Purl.
• Row 3: *K5, yo, k1, yo, k2tog, k2tog, ssk, ssk, yo, k1, yo, k5, repeat from *.
• Row 5: *K3, yo, k5, k2tog, ssk, k5, yo, k3, repeat from *.
• Row 7: *K8, yo, k2tog, ssk, yo, k8, repeat from *.
• Row 9: *K1, yo, k7, k2tog, ssk, k7, yo, k1, repeat from *.