Shown with a cast-on count of 16 stitches.  

• Row 1 (RS): K16.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Row 3: K1, kfb, k1, kfb, k1, k6, k1, kfb, k1, kfb, k1 (20 sts).
• Row 5: K1, kfb, k3, kfb, k1, k6, k1, kfb, k3, kfb, k1 (24 sts).
• Row 7: K1, kfb, k5, kfb, k1, k6, k1, kfb, k5, kfb, k1 (28 sts).
• Row 9: K1, kfb, k7, kfb, k1, k6, k1, kfb, k7, kfb, k1 (32 sts).
• Row 11: K1, kfb, k9, kfb, k1, k6, k1, kfb, k9, kfb, k1 (36 sts).
• Row 13: K1, kfb, k11, kfb, kfb, k6, kfb, kfb, k11, kfb, k1 (42 sts).
• Row 15: K1, kfb, k13, kfb, kfb, k8, kfb, kfb, k13, kfb, k1 (48 sts).