Shown with a cast-on count of 37 stitches.  

• Row 1 (RS): K1, *yo, ssk, k7, k2tog, yo, k1, repeat from *.
• Rows 2, 4, 6, and 8: Purl.
• Row 3: K2, *yo, ssk, k5, k2tog, yo, k3, repeat from * to last 11 sts, yo, ssk, k5, k2tog, yo, k2.
• Row 5: K1, *[yo, ssk] twice, k3, [k2tog, yo] twice, k1, repeat from *.
• Row 7: K2, *[yo, ssk] twice, k1, [k2tog, yo] twice, k3, repeat from * to last 11 sts, [yo, ssk] twice, k1, [k2tog, yo] twice, k2.
• Row 9: K1, *[yo, ssk] twice, yo, sl2-k1-p2sso, yo, [k2tog, yo] twice, k1, repeat from *.
• Row 11: K2, *[yo, ssk] twice, k1, [k2tog, yo] twice, k3, repeat from * to last 11 sts, [yo, ssk] twice, k1, [k2tog, yo] twice, k2.
• Rows 12, 14, 16, and 18: Purl.
• Row 13: K3, *yo, ssk, yo, sl2-k1-p2sso, yo, k2tog, yo, k5, repeat from * to last 10 sts, yo, ssk, yo, sl2-k1-p2sso, yo, k2tog, yo, k3.
• Row 15: K4, *yo, ssk, k1, k2tog, yo, k7, repeat from * to last 9 sts, yo, ssk, k1, k2tog, yo, k4.
• Row 17: K5, *yo, sl2-k1-p2sso, yo, k9, repeat from * to last 8 sts, yo, sl2-k1-p2sso, yo, k5.
• Repeat rows 1-18.