Shown with a cast-on count of 22 stitches.  

• Row 1 (RS): K3, *k2tog, k1, yo, p3, yo, k1, ssk, repeat from * to last st, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: Purl.
• Rows 3, 7, 11, and 15: K2, *k2, yo, ssk, p1, k2tog, yo, k2, repeat from * to last 2 sts, k2.
• Row 5: K1, *k1, k2tog, k1, yo, p1, yo, k1, ssk, k1, repeat from * to last 3 sts, k3.
• Row 9: K1, *ssk, k1, yo, p3, yo, k1, k2tog, repeat from * to last 3 sts, k3.
• Row 13: K3, *k1, ssk, k1, yo, p1, yo, k1, k2tog, k1, repeat from * to last st, k1.