Shown with a cast-on count of 40 stitches.  

• Rows 1, 3, 11, 13, 15, and 23 (RS): Knit.
• Rows 2, 4, 12, 14, 16, and 24: Purl.
• Rows 5, 7, and 9: K4, *k9, p5, k4, repeat from *.
• Rows 6, 8, and 10: *P4, k5, p9, repeat from * to last 4 sts, p4.
• Rows 17, 19, and 21: K4, *p5, k13, repeat from *.
• Rows 18, 20, and 22: *P13, k5, repeat from * to last 4 sts, p4.
• Repeat rows 1-24.