Shown with a cast-on count of 45 stitches.  

• Row 1 (RS): K5, *[yo, k2tog] 3 times, yo, k2, ssk, k10, repeat from *.
• Rows 2, 4, 6, 8, and 10: Purl.
• Row 3: K5, *k1, [yo, k2tog] 3 times, yo, k2, ssk, k5, k2tog, k2, yo, repeat from *.
• Row 5: K5, *k2, [yo, k2tog] 3 times, yo, k2, ssk, k3, k2tog, k2, yo, k1, repeat from *.
• Row 7: K5, *k3, [yo, k2tog] 3 times, yo, k2, ssk, k1, k2tog, k2, yo, k2, repeat from *.
• Row 9: K5, *k4, [yo, k2tog] 3 times, yo, k2, sl1-k2tog-psso, k2, yo, k3, repeat from *.