Shown with a cast-on count of 33 stitches.  

• Row 1 (RS): K5, *p1, k10, repeat from * to last 6 sts, p1, k5.
• Rows 2, 10, and 12: K4, *p3, k8, repeat from * to last 7 sts, p3, k4.
• Rows 3 and 9: K3, *p5, k6, repeat from * to last 8 sts, p5, k3.
• Rows 4 and 8: K2, *p7, k4, repeat from * to last 9 sts, p7, k2.
• Rows 5 and 7: K1, *p9, k2, repeat from * to last 10 sts, p9, k1.
• Row 6: P1, k9, *p2, k9, repeat from * to last st, p1.
• Row 11: P4, k3, *p8, k3, repeat from * to last 4 sts, p4.