Shown with a cast-on count of 22 stitches.  

• Rows 1 and 17 (RS): *K1, ssk, yo, k1, yo, k4, k2tog, k1, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, and 18: Purl.
• Rows 3 and 15: *K1, ssk, k1, yo, k1, yo, k3, k2tog, k1, repeat from *.
• Rows 5 and 13: *K1, ssk, k2, yo, k1, yo, k2, k2tog, k1, repeat from *.
• Rows 7 and 11: *K1, ssk, k3, yo, k1, yo, k1, k2tog, k1, repeat from *.
• Row 9: *K1, ssk, k4, yo, k1, yo, k2tog, k1, repeat from *.