Shown with a cast-on count of 18 stitches.  

• Row 1 (RS): K1, *k1, yo, k2, yo, ssk, k2tog, yo, k1, repeat from * to last st, k1 (multiple of 9 sts, plus 2).
• Rows 2, 4, 6, 8, and 10: Purl.
• Row 3: K1, *k2, yo, k2, ssk, k2tog, yo, k1, repeat from * to last st, k1.
• Row 5: K1, *k3, yo, k2, ssk, k2tog, repeat from * to last st, k1 (multiple of 8 sts, plus 2).
• Row 7: K1, *k4, yo, ssk, k2tog, repeat from * to last st, k1 (multiple of 7 sts, plus 2).
• Row 9: K1, *k2, yo, k1, yo, ssk, yo, k2tog, repeat from * to last st, k1 (multiple of 8 sts, plus 2).