Shown with a cast-on count of 50 stitches.  

• Rows 1, 5, and 9 (RS): K1, [k2tog, yo] 4 times, k1, *p10, k1, [k2tog, yo] 4 times, k1, repeat from *.
• Rows 2, 6, and 10: P10, *k10, p10, repeat from *.
• Rows 3 and 7: K1, [yo, k2tog] 4 times, *k12, [yo, k2tog] 4 times, repeat from * to last st, k1.
• Rows 4, 8, 14, and 18: Purl.
• Rows 11, 15, and 19: P10, *k1, [k2tog, yo] 4 times, k1, p10, repeat from *.
• Rows 12, 16, and 20: K10, *p10, k10, repeat from *.
• Rows 13 and 17: K10, *k1, [yo, k2tog] 4 times, k11, repeat from *.
• Repeat rows 1-20.