Shown with a cast-on count of 8 stitches.  

• Round 1: [Yo, k1] 8 times (16 sts).
• Rounds 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, and 26: Knit.
• Round 3: *Yo, k1, repeat from * (32 sts).
• Rounds 5, 9, and 11: *Yo, k2tog, repeat from *.
• Round 7: *Yo, k1, repeat from * (64 sts).
• Round 13: *Yo, k2, repeat from * (96 sts).
• Rounds 15, 17, and 19: *Yo, k1, k2tog, repeat from *.
• Round 21: *Yo, k3, repeat from * (128 sts).
• Round 23: *Yo, k1, yo, k1, k2tog, repeat from * (160 sts).
• Round 24: *K3, k2tog, repeat from * (128 sts).
• Round 25: *Yo, k2, k2tog, repeat from *.