Shown with a cast-on count of 24 stitches.  

• Rows 1 and 13 (RS): K4, *yo, ssk, k1, [k2tog, yo] twice, k3, repeat from *.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Rows 3 and 11: K3, *[yo, ssk] twice, k1, k2tog, yo, k3, repeat from * to last st, k1.
• Rows 5 and 9: K2, *[yo, ssk] 3 times, k4, repeat from * to last 2 sts, yo, ssk.
• Row 7: K1, *[yo, ssk] 4 times, k2, repeat from * to last 3 sts, yo, ssk, k1.
• Rows 15 and 19: K2tog, yo, *k4, [k2tog, yo] 3 times, repeat from * to last 2 sts, k2.
• Row 17: K1, k2tog, yo, *k2, [k2tog, yo] 4 times, repeat from * to last st, k1.
• Repeat rows 1-20.