Shown with a cast-on count of 21 stitches.  

• Rows 1 and 3 (RS): *K5, p2, yo, p2tog, repeat from * to last 3 sts, p3.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 22: Purl.
• Rows 5 and 21: *K4, p2, yo, p2tog, p1, repeat from * to last 3 sts, p3.
• Row 7: *K3, p2, yo, p2tog, p2, repeat from * to last 3 sts, p3.
• Rows 9 and 19: *K2, p3, yo, p2tog, p2, repeat from * to last 3 sts, p3.
• Rows 11, 13, 15, and 17: *K1, p2, yo, p2tog, p2, yo, p2tog, repeat from * to last 3 sts, p3.