Shown with a cast-on count of 27 stitches.  

• Rows 1 and 15 (RS): K2, (k1, yo, k1) in next st, *k1, yo, k2, k2tog, k1, ssk, k2, yo, repeat from * to last 4 sts, k1, (k1, yo, k1) in next st, k2 (multiple of 10 sts, plus 11).
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, 20, and 22: K2, yo, purl to last 2 sts, yo, k2 (2 more sts).
• Rows 3 and 17: K2, (k1, yo, k1) in next st, k1, k2tog, yo, *k1, yo, k2, k2tog, k1, ssk, k2, yo, repeat from * to last 7 sts, k1, yo, ssk, k1, (k1, yo, k1) in next st, k2 (multiple of 10 sts, plus 17).
• Rows 5 and 19: K2, (k1, yo, k1) in next st, k2, ssk, k2tog, yo, *k1, yo, ssk, k2tog, yo, k1, yo, ssk, k2tog, yo, repeat from * to last 10 sts, k1, yo, ssk, k2tog, k2, (k1, yo, k1) in next st, k2 (multiple of 10 sts, plus 21).
• Rows 7 and 21: K2, (k1, yo, k1) in next st, k2tog, yo, k3, yo, ssk, k1, *k2, k2tog, yo, k3, yo, ssk, k1, repeat from * to last 12 sts, k2, k2tog, yo, k3, yo, ssk, (k1, yo, k1) in next st, k2 (multiple of 10 sts, plus 27).
• Row 9: K2, (k1, yo, k1) in next st, k1, *k1, k2tog, yo, k5, yo, ssk, repeat from * to last 5 sts, k2, (k1, yo, k1) in next st, k2 (multiple of 10 sts, plus 13).
• Row 11: K2, (k1, yo, k1) in next st, k3, yo, *sl1-k2tog-psso, yo, k7, yo, repeat from * to last 9 sts, sl1-k2tog-psso, yo, k3, (k1, yo, k1) in next st, k2 (multiple of 10 sts, plus 19).
• Row 13: K2, (k1, yo, k1) in next st, k3, ssk, k2, yo, *k1, yo, k2, k2tog, k1, ssk, k2, yo, repeat from * to last 11 sts, k1, yo, k2, k2tog, k3, (k1, yo, k1) in next st, k2 (multiple of 10 sts, plus 25).
• Repeat rows 1-14.