Shown with a cast-on count of 22 stitches.  

• Rows 1 and 11 (RS): *K1, ssk, k2, yo, k1, yo, k2, k2tog, k1, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Row 3: *K2, ssk, [k1, yo] twice, k1, k2tog, k2, repeat from *.
• Rows 5 and 9: *K1, ssk, k1, yo, k3, yo, k1, k2tog, k1, repeat from *.
• Row 7: *Ssk, k3, yo, k1, yo, k3, k2tog, repeat from *.
• Row 13: *K1, yo, ssk, k5, k2tog, yo, k1, repeat from *.
• Row 15: *K2, ssk, yo, k3, yo, k2tog, k2, repeat from *.