Shown with a cast-on count of 19 stitches.  

• Rows 1 and 11 (RS): P1, k2, *k3, p1, k2, repeat from * to last 4 sts, k3, p1.
• Rows 2, 10, and 12: K1, p3, *p2, k1, p3, repeat from * to last 3 sts, p2, k1.
• Row 3: K1, yo, ssk, *p1, k2tog, yo, k1, yo, ssk, repeat from * to last 4 sts, p1, k2tog, yo, k1.
• Rows 4, 6, and 8: P3, k1, *p5, k1, repeat from * to last 3 sts, p3.
• Rows 5 and 7: K3, *p1, k5, repeat from * to last 4 sts, p1, k3.
• Row 9: P1, k2tog, yo, *k1, yo, ssk, p1, k2tog, yo, repeat from * to last 4 sts, k1, yo, ssk, p1.