Shown with a cast-on count of 10 stitches.  

• Row 1 (RS): K1, *yo, k2tog, k2, repeat from * to last st, k1.
• Rows 2, 4, 6, 8, 10, and 12: Purl.
• Row 3: *K2, yo, k2tog, repeat from * to last 2 sts, k2.
• Row 5: K1, *k2, yo, k2tog, repeat from * to last st, k1.
• Row 7: K2, *yo, k2tog, k2, repeat from *.
• Row 9: K1, *k2tog, yo, k2, repeat from * to last st, k1.
• Row 11: *K2, k2tog, yo, repeat from * to last 2 sts, k2.