Shown with a cast-on count of 67 stitches.  

• Rows 1, 3, and 5 (RS): K1, sl1-k2tog-psso, k9, yo, (k1, yo, k1) in next st, yo, k5, k5tog, k11, yo, (k1, yo, k1) in next st, yo, k9, k5tog, k7, yo, (k1, yo, k1) in next st, yo, k5, k3tog, k1.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Row 7: K1, sl1-k2tog-psso, k9, (k1, yo, k1) in next st, yo, k1, yo, k4, k5tog, k11, (k1, yo, k1) in next st, yo, k1, yo, k8, k5tog, k7, (k1, yo, k1) in next st, yo, k1, yo, k4, k3tog, k1.
• Row 9: K1, sl1-k2tog-psso, k8, yo, (k1, yo, k1) in next st, yo, k6, k5tog, k10, yo, (k1, yo, k1) in next st, yo, k10, k5tog, k6, yo, (k1, yo, k1) in next st, yo, k6, k3tog, k1.
• Row 11: K1, sl1-k2tog-psso, k8, (k1, yo, k1) in next st, yo, k1, yo, k5, k5tog, k10, (k1, yo, k1) in next st, yo, k1, yo, k9, k5tog, k6, (k1, yo, k1) in next st, yo, k1, yo, k5, k3tog, k1.
• Row 13: K1, sl1-k2tog-psso, k7, yo, (k1, yo, k1) in next st, yo, k7, k5tog, k9, yo, (k1, yo, k1) in next st, yo, k11, k5tog, k5, yo, (k1, yo, k1) in next st, yo, k7, k3tog, k1.
• Row 15: K1, sl1-k2tog-psso, k7, (k1, yo, k1) in next st, yo, k1, yo, k6, k5tog, k9, (k1, yo, k1) in next st, yo, k1, yo, k10, k5tog, k5, (k1, yo, k1) in next st, yo, k1, yo, k6, k3tog, k1.
• Row 17: K1, sl1-k2tog-psso, k6, yo, (k1, yo, k1) in next st, yo, k8, k5tog, k8, yo, (k1, yo, k1) in next st, yo, k12, k5tog, k4, yo, (k1, yo, k1) in next st, yo, k8, k3tog, k1.
• Row 19: K1, sl1-k2tog-psso, k6, (k1, yo, k1) in next st, yo, k1, yo, k7, k5tog, k8, (k1, yo, k1) in next st, yo, k1, yo, k11, k5tog, k4, (k1, yo, k1) in next st, yo, k1, yo, k7, k3tog, k1.