Shown with a cast-on count of 39 stitches.  

• Rows 1 and 3 (RS): K39.
• Rows 2 and 4: K39.
• Row 5: [K6, (k1, yo, k1) in next st, k6] 3 times (45 sts).
• Rows 6 and 8: [K6, p3, k6] 3 times.
• Row 7: [K5, k2tog, (k1, yo, k1) in next st, ssk, k5] 3 times.
• Row 9: [K4, k2tog, k1, (k1, yo, k1) in next st, k1, ssk, k4] 3 times.
• Row 10: [K5, p5, k5] 3 times.
• Row 11: [K3, k2tog, k2, (k1, yo, k1) in next st, k2, ssk, k3] 3 times.
• Row 12: [K4, p7, k4] 3 times.
• Row 13: [K2, k2tog, k3, (k1, yo, k1) in next st, k3, ssk, k2] 3 times.
• Row 14: [K3, p9, k3] 3 times.
• Row 15: [K1, k2tog, k4, (k1, yo, k1) in next st, k4, ssk, k1] 3 times.
• Row 16: [K2, p11, k2] 3 times.
• Rows 17, 19, and 21: [K2tog, k5, (k1, yo, k1) in next st, k5, ssk] 3 times.
• Rows 18, 20, and 22: [P15] 3 times.