Shown with a cast-on count of 36 stitches.  

• Rows 1 and 9 (RS): K2tog, yo, k2, yo, ssk, *[k2tog, yo, k2, yo, ssk] twice, repeat from * to last 6 sts, k2tog, yo, k2, yo, ssk.
• Rows 2, 6, 10, and 14: Purl.
• Row 3: Yo, ssk, [k2tog, yo] twice, *[yo, ssk] twice, k2tog, [yo] twice, ssk, [k2tog, yo] twice, repeat from * to last 6 sts, [yo, ssk] twice, k2tog, yo.
• Rows 4, 8, 12, and 16: P5, k1, *[p5, k1] twice, repeat from * to last 6 sts, p6.
• Row 5: K1, k2tog, yo, k3, *k3, yo, ssk, k2, k2tog, yo, k3, repeat from * to last 6 sts, k3, yo, ssk, k1.
• Rows 7 and 15: Yo, k2tog, k2, ssk, yo, *yo, k2tog, k2, ssk, [yo] twice, k2tog, k2, ssk, yo, repeat from * to last 6 sts, yo, k2tog, k2, ssk, yo.
• Row 11: [Yo, ssk] twice, k2tog, yo, *yo, ssk, k2tog, yo, k2tog, [yo] twice, ssk, yo, ssk, k2tog, yo, repeat from * to last 6 sts, yo, ssk, [k2tog, yo] twice.
• Row 13: K3, yo, ssk, k1, *k1, k2tog, yo, k6, yo, ssk, k1, repeat from * to last 6 sts, k1, k2tog, yo, k3.