Shown with a cast-on count of 20 stitches.  

• Rows 1 and 3 (RS): *K2, p2, repeat from *.
• Row 2: *K2, p2, repeat from *.
• Rows 4 and 6: *K2, p2, repeat from * to last 4 sts, k4.
• Row 5: P4, *k2, p2, repeat from *.
• Rows 7 and 9: K4, *k2, p2, repeat from *.
• Row 8: *K2, p2, repeat from * to last 4 sts, p4.
• Rows 10 and 12: *K2, p2, repeat from * to last 8 sts, k8.
• Row 11: P8, *k2, p2, repeat from *.
• Rows 13 and 15: K8, *k2, p2, repeat from *.
• Row 14: *K2, p2, repeat from * to last 8 sts, p8.
• Rows 16 and 18: *K2, p2, repeat from * to last 12 sts, k12.
• Row 17: P12, *k2, p2, repeat from *.
• Rows 19 and 21: K12, *k2, p2, repeat from *.
• Row 20: *K2, p2, repeat from * to last 12 sts, p12.
• Row 22: BO (0 sts).