Shown with a cast-on count of 37 stitches.  

• Rows 1, 3, and 5 (RS): *K2, sl1-k2tog-psso, yo, [k1, yo] 3 times, k3tog, k1, repeat from * to last st, k1.
• Rows 2, 4, and 6: K2, *p9, k3, repeat from * to last 11 sts, p9, k2.
• Rows 7, 9, and 11: *[K1, yo] twice, k3tog, p3, sl1-k2tog-psso, yo, k1, yo, repeat from * to last st, k1.
• Rows 8, 10, and 12: K5, *p3, k9, repeat from * to last 8 sts, p3, k5.
• Repeat rows 1-12.