Shown with a cast-on count of 21 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, and 27 (WS): Purl.
• Row 2: K8, yo, ssk, p1, k2tog, yo, k8.
• Row 4: K2, yo, ssk, k6, p1, k6, k2tog, yo, k2.
• Row 6: Yo, ssk, k1, yo, ssk, k5, p1, k5, k2tog, yo, k1, k2tog, yo.
• Row 8: K1, yo, ssk, k1, k2tog, yo, k4, p1, k4, yo, ssk, k1, k2tog, yo, k1.
• Row 10: K3, k2tog, yo, k3, ssk, yo, p1, yo, ssk, k3, yo, ssk, k3.
• Row 12: K2, k2tog, k3, ssk, yo, k1, yo, p1, yo, k1, yo, k2tog, k3, ssk, k2.
• Row 14: K6, ssk, yo, k2, p1, k2, yo, k2tog, k6.
• Row 16: K1, yo, ssk, k4, ssk, yo, k1, p1, k1, yo, k2tog, k4, k2tog, yo, k1.
• Row 18: K5, yo, k3, ssk, p1, k2tog, k3, yo, k5.
• Row 20: K2, yo, ssk, k4, ssk, yo, p1, yo, k2tog, k4, k2tog, yo, k2.
• Row 22: K7, yo, k1, k2tog, p1, ssk, k1, yo, k7.
• Row 24: K7, k2tog, yo, k1, p1, k1, yo, ssk, k7.
• Row 26: K5, yo, k2tog, k3, p1, k3, ssk, yo, k5.
• Row 28: K4, yo, k2tog, k4, p1, k4, ssk, yo, k4.