Shown with a cast-on count of 21 stitches.  

• Rows 1, 3, 5, 7, 9, and 11 (WS): Purl.
• Rows 2 and 6: K4, *ssk, yo, k1, yo, k2tog, k3, repeat from * to last st, k1.
• Row 4: K5, *yo, sl2-k1-p2sso, yo, k5, repeat from *.
• Rows 8 and 12: Ssk, yo, k1, yo, k2tog, *k3, ssk, yo, k1, yo, k2tog, repeat from *.
• Row 10: K1, *yo, sl2-k1-p2sso, yo, k5, repeat from * to last 4 sts, yo, sl2-k1-p2sso, yo, k1.