Shown with a cast-on count of 23 stitches.  

• Rows 1, 3, and 5 (WS): *K2, yo, p8, yo, repeat from * to last 3 sts, k3 (multiple of 12 sts, plus 3).
• Rows 2, 4, and 6: P3, *k2, k2tog, p2, ssk, k2, p2, repeat from * (multiple of 10 sts, plus 3).
• Rows 7, 9, and 11: K1, *k1, yo, p8, yo, k1, repeat from * to last 2 sts, k2 (multiple of 12 sts, plus 3).
• Rows 8, 10, and 12: P2, *p1, k1, k2tog, p2, ssk, k2, p2, repeat from * to last st, p1 (multiple of 10 sts, plus 3).