Shown with a cast-on count of 20 stitches.  

• Row 1 (RS): *Yo, k2tog, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Row 3: *[Yo, k2tog] 4 times, yo, ssk, repeat from *.
• Row 5: *[Yo, k2tog] 3 times, [yo, ssk] twice, repeat from *.
• Row 7: *[Yo, k2tog] twice, [yo, ssk] 3 times, repeat from *.
• Row 9: *Yo, k2tog, [yo, ssk] 4 times, repeat from *.
• Row 11: *Yo, ssk, repeat from *.
• Row 13: *[Yo, ssk] 4 times, yo, k2tog, repeat from *.
• Row 15: *[Yo, ssk] 3 times, [yo, k2tog] twice, repeat from *.
• Row 17: *[Yo, ssk] twice, [yo, k2tog] 3 times, repeat from *.
• Row 19: *Yo, ssk, [yo, k2tog] 4 times, repeat from *.