Shown with a cast-on count of 68 stitches.  

• Round 1: [K17] 4 times.
• Round 2: [K2tog, k2, k2tog, k2, k2tog, k2, k2tog, k3] 4 times (52 sts).
• Rounds 3 and 5: Knit.
• Round 4: [K2tog, k2, k2tog, k2, k2tog, k1, k2tog] 4 times (36 sts).
• Round 6: [K2tog, k1, k2tog, k1, k2tog, k1] 4 times (24 sts).
• Round 7: [K2tog, k2tog, k2tog] 4 times (12 sts).
• Round 8: [K2tog, k1] 4 times (8 sts).
• Round 9: [K2tog, k2tog] twice (4 sts).