Shown with a cast-on count of 26 stitches.  

• Rows 1 and 5 (RS): K1, *p3, k3, yo, sl1-k2tog-psso, yo, k3, repeat from * to last st, k1.
• Rows 2, 4, 6, and 8: K1, *p9, k3, repeat from * to last st, k1.
• Rows 3 and 7: K1, *p3, k1, k2tog, yo, k3, yo, ssk, k1, repeat from * to last st, k1.
• Rows 9 and 13: K1, *yo, sl1-k2tog-psso, yo, k3, p3, k3, repeat from * to last st, k1.
• Rows 10, 12, 14, and 16: K1, *p3, k3, p6, repeat from * to last st, k1.
• Rows 11 and 15: K1, *k3, yo, ssk, k1, p3, k1, k2tog, yo, repeat from * to last st, k1.