Shown with a cast-on count of 30 stitches.  

• Rows 1, 3, 5, 7, 9, and 11 (RS): Purl.
• Row 2: K2, *k2tog, k1, yo, ssk, yo, ssk, yo, k1, ssk, k2, repeat from * to last 4 sts, k4 (multiple of 11 sts, plus 6).
• Row 4: K1, k2tog, k1, yo, *k1, yo, ssk, yo, ssk, yo, k1, ssk, k2tog, k1, yo, repeat from * to last 2 sts, k2.
• Row 6: K3, yo, *k3, [yo, ssk] twice, yo, k1, ssk, k1, yo, repeat from * to last 3 sts, k3 (multiple of 12 sts, plus 7).
• Row 8: K5, *k2tog, k1, yo, [k2tog, yo] twice, k1, ssk, k2, repeat from * to last 2 sts, k2 (multiple of 11 sts, plus 7).
• Row 10: K4, *k2tog, k1, yo, [k2tog, yo] twice, k1, yo, k1, ssk, repeat from * to last 3 sts, k3.
• Row 12: K3, k2tog, *k1, yo, [k2tog, yo] twice, k3, yo, k1, k2tog, repeat from * to last 2 sts, k2.