Shown with a cast-on count of 21 stitches.  

• Round 1: K5, ssk, k5, incL, incR, k2, k2tog, k5.
• Rounds 2, 4, 6, 8, 10, and 12: Knit.
• Round 3: K5, ssk, k4, incL, k2, incR, k1, k2tog, k5.
• Round 5: K5, ssk, k3, incL, k4, incR, k2tog, k5.
• Round 7: K5, ssk, k2, incL, incR, k5, k2tog, k5.
• Round 9: K5, ssk, k1, incL, k2, incR, k4, k2tog, k5.
• Round 11: K5, ssk, incL, k4, incR, k3, k2tog, k5.