Shown with a cast-on count of 21 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, 15, 17, and 19 (WS): K1, *p10, repeat from *.
• Rows 2, 6, and 10: *K1, [yo, k1] 3 times, [ssk] 3 times, repeat from * to last st, p1.
• Rows 4 and 8: *K1, [k1, yo] 3 times, [ssk] 3 times, repeat from * to last st, p1.
• Rows 12, 16, and 20: *[K2tog] 3 times, [k1, yo] 3 times, k1, repeat from * to last st, p1.
• Rows 14 and 18: *[K2tog] 3 times, [yo, k1] 3 times, k1, repeat from * to last st, p1.