Shown with a cast-on count of 12 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, and 15 (RS): Purl.
• Row 2: *Kfb, repeat from * (multiple of 2 sts).
• Row 4: *Kfb, k1, repeat from * (multiple of 3 sts).
• Row 6: *[Kfb, k2] 3 times, kfb, k3, kfb, k1, kfb, k2, repeat from * (multiple of 24 sts).
• Row 8: *[Kfb, k3] 3 times, kfb, k4, kfb, k2, kfb, k3, repeat from * (multiple of 30 sts).
• Rows 10 and 12: Knit.
• Row 14: *K2tog, k3, repeat from * (multiple of 4 sts).