Shown with a cast-on count of 27 stitches.  

• Row 1 (RS): K27.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 22: Purl.
• Row 3: K2, yo, ssk, k7, k2tog, yo, k1, yo, ssk, k7, k2tog, yo, k2.
• Row 5: K3, yo, ssk, k5, k2tog, yo, k3, yo, ssk, k5, k2tog, yo, k3.
• Row 7: K4, yo, ssk, k3, k2tog, yo, k5, yo, ssk, k3, k2tog, yo, k4.
• Row 9: K5, yo, ssk, k1, k2tog, yo, k7, yo, ssk, k1, k2tog, yo, k5.
• Row 11: K6, yo, sl1-k2tog-psso, yo, k1, yo, ssk, k3, k2tog, yo, k1, yo, sl1-k2tog-psso, yo, k6.
• Row 13: K8, yo, ssk, k2, yo, sl1-k2tog-psso, yo, k2, k2tog, yo, k8.
• Row 15: K9, yo, ssk, k5, k2tog, yo, k9.
• Row 17: K10, yo, ssk, k3, k2tog, yo, k10.
• Row 19: K11, yo, ssk, k1, k2tog, yo, k11.
• Row 21: K12, yo, sl1-k2tog-psso, yo, k12.