Shown with a cast-on count of 25 stitches.  

• Rows 1 and 5 (RS): *K1, yo, ssk, yo, sl1-k2tog-psso, yo, k2tog, yo, repeat from * to last st, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Rows 3 and 7: *K2, yo, ssk, k1, k2tog, yo, k1, repeat from * to last st, k1.
• Rows 9 and 13: [K2tog, yo] twice, *k1, yo, ssk, yo, sl1-k2tog-psso, yo, k2tog, yo, repeat from * to last 5 sts, k1, [yo, ssk] twice.
• Rows 11 and 15: *K1, k2tog, yo, k3, yo, ssk, repeat from * to last st, k1.