Shown with a cast-on count of 25 stitches.  

• Rows 1 and 23 (RS): P1, *k11, p1, repeat from *.
• Row 2: *P1, k11, repeat from * to last st, k1.
• Row 3: P1, *p1, k9, p2, repeat from *.
• Rows 4 and 22: *K2, p9, k1, repeat from * to last st, k1.
• Rows 5 and 19: P1, *p2, k7, p3, repeat from *.
• Row 6: *K3, p7, k2, repeat from * to last st, k1.
• Row 7: K1, *p3, k5, p4, repeat from *.
• Rows 8 and 18: *K4, p5, k3, repeat from * to last st, k1.
• Rows 9 and 15: P1, *p4, k3, p5, repeat from *.
• Rows 10 and 16: *K5, p3, k4, repeat from * to last st, k1.
• Rows 11 and 13: P1, *p5, k1, p6, repeat from *.
• Rows 12 and 14: *K6, p1, k5, repeat from * to last st, k1.
• Row 17: P1, *p3, k5, p4, repeat from *.
• Row 20: *K3, p9, repeat from * to last st, k1.
• Row 21: P1, *p2, k9, p1, repeat from *.
• Row 24: *K1, p11, repeat from * to last st, k1.