Shown with a cast-on count of 20 stitches.  

• Row 1 (RS): K1, *p2, k1, yo, k1, p2, k2, repeat from * to last 3 sts, p2, k1 (multiple of 9 sts, plus 4).
• Rows 2, 4, and 6: P1, *k2, p2, k2, p3, repeat from * to last 3 sts, k2, p1.
• Rows 3 and 5: K1, *p2, k3, p2, k2, repeat from * to last 3 sts, p2, k1.
• Row 7: K1, *p2, k1, drop st, k1, p2, k1, yo, k1, repeat from * to last 3 sts, p2, k1.
• Rows 8, 10, and 12: P1, *k2, p3, k2, p2, repeat from * to last 3 sts, k2, p1.
• Rows 9 and 11: K1, *p2, k2, p2, k3, repeat from * to last 3 sts, p2, k1.
• Row 13: K1, *p2, k1, yo, k1, p2, k1, drop st, k1, repeat from * to last 3 sts, p2, k1.