Shown with a cast-on count of 12 stitches.  

• Rows 1 and 3 (RS): K1, ssk, yo, ssk, k3, yo, k2tog, yo, k2.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: K2, purl to last 2 sts, k2.
• Row 5: K1, ssk, yo, sl1-k2tog-psso, k2, yo, k2, yo, k2.
• Row 7: K1, ssk, yo, sl1-k2tog-psso, k1, yo, k3, yo, k2.
• Row 9: K1, ssk, yo, sl1-k2tog-psso, yo, k4, yo, k2.
• Rows 11 and 13: K1, ssk, yo, ssk, yo, k3, k2tog, yo, k2.
• Row 15: K1, ssk, yo, k2, yo, k2, k3tog, yo, k2.
• Row 17: K1, ssk, yo, k3, yo, k1, k3tog, yo, k2.
• Row 19: K1, ssk, yo, k4, yo, k3tog, yo, k2.