Shown with a cast-on count of 20 stitches.  

• Rows 1, 7, and 13 (WS): Purl.
• Rows 2, 4, and 6: K1, *p3, k6, repeat from * to last st, k1.
• Rows 3 and 5: K1, *p6, k3, repeat from * to last st, k1.
• Rows 8, 10, and 12: K1, *k3, p3, k3, repeat from * to last st, k1.
• Rows 9 and 11: K1, *p3, k3, p3, repeat from * to last st, k1.
• Rows 14 and 16: K1, *k6, p3, repeat from * to last st, k1.
• Rows 15 and 17: K1, *k3, p6, repeat from * to last st, k1.