Shown with a cast-on count of 13 stitches.  

• Row 1 (RS): K1, *k3, yo, p2tog, repeat from * to last 2 sts, k2.
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Row 3: K1, *k2, yo, p2tog, k1, repeat from * to last 2 sts, k2.
• Row 5: K1, *k1, yo, p2tog, k2, repeat from * to last 2 sts, k2.
• Row 7: K1, *k3, p2tog, yo, repeat from * to last 2 sts, k2.
• Row 9: K1, *k2, p2tog, yo, k1, repeat from * to last 2 sts, k2.
• Row 11: K1, *k1, p2tog, yo, k2, repeat from * to last 2 sts, k2.