Shown with a cast-on count of 36 stitches.  

• Row 1 (RS): *K1, ssk, yo, k4, k2tog, [yo] twice, ssk, k4, yo, k2tog, k1, repeat from *.
• Rows 2 and 10: *P8, k1, p9, repeat from *.
• Row 3: *Yo, k2tog, k3, k3tog, [yo] twice, k2, [yo] twice, sl1-k2tog-psso, k3, ssk, yo, repeat from *.
• Row 4: *P6, k1, p3, k1, p6, k1, repeat from *.
• Row 5: *K4, k2tog, [yo] twice, k1, k2tog, ssk, k1, [yo] twice, ssk, k4, repeat from *.
• Row 6: *[P5, k1] twice, p6, repeat from *.
• Row 7: *K3, k2tog, [yo] twice, k2, k2tog, ssk, k2, [yo] twice, ssk, k3, repeat from *.
• Row 8: *P4, k1, p7, k1, p5, repeat from *.
• Row 9: *K2, yo, k2tog, yo, k1, [k2tog] twice, [yo] twice, [ssk] twice, k1, yo, ssk, yo, k2, repeat from *.
• Row 11: *Yo, ssk, k4, yo, k2tog, k2, ssk, yo, k4, k2tog, yo, repeat from *.
• Rows 12 and 20: *P17, k1, repeat from *.
• Row 13: *K1, [yo] twice, sl1-k2tog-psso, k3, ssk, [yo] twice, k2tog, k3, k3tog, [yo] twice, k1, repeat from *.
• Row 14: *P1, [k1, p6] twice, k1, p2, repeat from *.
• Row 15: *Ssk, k1, [yo] twice, ssk, k8, k2tog, [yo] twice, k1, k2tog, repeat from *.
• Row 16: *P2, k1, p11, k1, p3, repeat from *.
• Row 17: *Ssk, k2, [yo] twice, ssk, k6, k2tog, [yo] twice, k2, k2tog, repeat from *.
• Row 18: *P3, k1, p9, k1, p4, repeat from *.
• Row 19: *Yo, [ssk] twice, k1, yo, ssk, yo, k4, yo, k2tog, yo, k1, [k2tog] twice, yo, repeat from *.