Shown with a cast-on count of 20 stitches.  

• Rows 1 and 11 (RS): Knit.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 26, and 28: Purl.
• Rows 3 and 21: *Yo, k1, yo, k3tog, k6, repeat from *.
• Rows 5 and 23: *K1, yo, k1, yo, k1, k3tog, k4, repeat from *.
• Rows 7 and 25: *K2, yo, k1, yo, k2, k3tog, k2, repeat from *.
• Rows 9 and 27: *K3, yo, k1, yo, k3, k3tog, repeat from *.
• Row 13: *K6, k3tog, yo, k1, yo, repeat from *.
• Row 15: *K4, k3tog, k1, yo, k1, yo, k1, repeat from *.
• Row 17: *K2, k3tog, k2, yo, k1, yo, k2, repeat from *.
• Row 19: *K3tog, k3, yo, k1, yo, k3, repeat from *.