Shown with a cast-on count of 12 stitches.  

• Row 1 (RS): K4, yo, k1, yo, k1, yo, k1, yo, k1, yo, k4 (17 sts).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Row 3: K3, yo, k1, k2tog, yo, k2tog, yo, k1, yo, ssk, yo, ssk, k1, yo, k3 (19 sts).
• Row 5: K5, yo, k2tog, yo, k2tog, yo, k1, yo, ssk, yo, ssk, yo, k5 (21 sts).
• Row 7: K4, k2tog, yo, k2tog, yo, k2tog, yo, k1, yo, ssk, yo, ssk, yo, ssk, k4.
• Row 9: K6, yo, k2tog, yo, k2tog, yo, k1, yo, ssk, yo, ssk, yo, k6 (23 sts).
• Row 11: K5, yo, k2, yo, ssk, ssk, k1, k2tog, k2tog, yo, k2, yo, k5.
• Row 13: K5, yo, k1, yo, ssk, ssk, k3, k2tog, k2tog, yo, k1, yo, k5.
• Row 15: K5, yo, ssk, ssk, k5, k2tog, k2tog, yo, k5 (21 sts).
• Row 17: K4, yo, k1, yo, ssk, ssk, k3, k2tog, k2tog, yo, k1, yo, k4.
• Row 19: K4, yo, k2, yo, ssk, ssk, k1, k2tog, k2tog, yo, k2, yo, k4.