Shown with a cast-on count of 2 stitches.  

• Round 1: K1, yo, k1, yo (4 sts).
• Rounds 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, and 26: Knit.
• Round 3: *K1, yo, repeat from * (8 sts).
• Round 5: *K1, yo, repeat from * (16 sts).
• Round 7: *K2tog, yo, k1, yo, k1, yo, repeat from * (24 sts).
• Round 9: *K2tog, yo, k1, yo, k1, yo, repeat from * (36 sts).
• Round 11: *K2tog, yo, k1, yo, k1, yo, repeat from * (54 sts).
• Rounds 13, 17, 21, 23, 25, and 27: *K2tog, yo, repeat from *.
• Round 15: *K2tog, yo, k1, yo, k1, yo, repeat from * to last 2 sts, k2tog, yo (80 sts).
• Round 19: *K2tog, yo, k1, yo, k1, yo, repeat from * (120 sts).