Shown with a cast-on count of 19 stitches.  

• Row 1 (RS): K6, yo, k3tog, yo, k1, yo, k3tog, yo, k6.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Row 3: K4, k2tog, yo, k2, k2tog, yo, k3, yo, ssk, k4.
• Row 5: K4, k2tog, yo, k7, yo, ssk, k4.
• Row 7: K5, ssk, yo, k5, yo, k2tog, k5.
• Row 9: K6, ssk, yo, k3, yo, k2tog, k6.
• Row 11: K7, ssk, yo, k1, yo, k2tog, k7.
• Row 13: K9, yo, k2tog, k8.
• Row 15: Knit.