Shown with a cast-on count of 25 stitches.  

• Row 1 (RS): K1, *k1, yo, k3, k2tog, k3, yo, k3, repeat from * (multiple of 13 sts, plus 1).
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Row 3: K1, *k2, yo, k3, k2tog, k3, yo, k3, repeat from * (multiple of 14 sts, plus 1).
• Row 5: K1, *k3, yo, k3, k2tog, k3, yo, k3, repeat from * (multiple of 15 sts, plus 1).
• Row 7: K1, *k4, yo, k3, k2tog, k3, yo, k3, repeat from * (multiple of 16 sts, plus 1).
• Row 9: K1, *k2, k2tog, k6, k2tog, k4, repeat from * (multiple of 14 sts, plus 1).
• Row 11: K1, *k2, k2tog, k5, k2tog, k3, repeat from * (multiple of 12 sts, plus 1).