Shown with a cast-on count of 41 stitches.  

• Row 1 (RS): Kfb, k4, k2tog, k4, yo, *k4, k2tog, k4, yo, repeat from * to last 10 sts, k4, k2tog, k4.
• Rows 2, 4, 6, 8, 10, 12, 14, 16, 18, and 20: Purl.
• Row 3: K1, yo, k3, sl2-k1-p2sso, k3, yo, k1, *yo, k3, sl2-k1-p2sso, k3, yo, k1, repeat from * to last 10 sts, yo, k3, sl2-k1-p2sso, k3, yo, k1.
• Row 5: K2, yo, k2, sl2-k1-p2sso, k2, yo, k2, *k1, yo, k2, sl2-k1-p2sso, k2, yo, k2, repeat from * to last 10 sts, k1, yo, k2, sl2-k1-p2sso, k2, yo, k2.
• Row 7: K3, yo, k1, sl2-k1-p2sso, k1, yo, k3, *k2, yo, k1, sl2-k1-p2sso, k1, yo, k3, repeat from * to last 10 sts, k2, yo, k1, sl2-k1-p2sso, k1, yo, k3.
• Row 9: K4, yo, sl2-k1-p2sso, yo, k4, *k3, yo, sl2-k1-p2sso, yo, k4, repeat from * to last 10 sts, k3, yo, sl2-k1-p2sso, yo, k4.
• Row 11: K5, yo, k4, k2tog, *k4, yo, k4, k2tog, repeat from * to last 10 sts, k4, yo, k4, k2tog.
• Row 13: K2tog, k3, yo, k1, yo, k3, sl2-k1-p2sso, *k3, yo, k1, yo, k3, sl2-k1-p2sso, repeat from * to last 9 sts, k3, yo, k1, yo, k3, k2tog.
• Row 15: K2tog, k2, yo, k3, yo, k2, sl2-k1-p2sso, *k2, yo, k3, yo, k2, sl2-k1-p2sso, repeat from * to last 9 sts, k2, yo, k3, yo, k2, k2tog.
• Row 17: K2tog, k1, yo, k5, yo, k1, sl2-k1-p2sso, *k1, yo, k5, yo, k1, sl2-k1-p2sso, repeat from * to last 9 sts, k1, yo, k5, yo, k1, k2tog.
• Row 19: K2tog, yo, k7, yo, sl2-k1-p2sso, *yo, k7, yo, sl2-k1-p2sso, repeat from * to last 9 sts, yo, k7, yo, k2tog.
• Repeat rows 1-20.