Shown with a cast-on count of 40 stitches.  

• Row 1 (RS): *P2, k2tog, yo, p2, k3, k2tog, yo, k1, yo, ssk, k3, repeat from * to last 6 sts, p2, k2tog, yo, p2.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: K2, p2, k2, *p11, k2, p2, k2, repeat from *.
• Row 3: *P2, yo, k2tog, p2, k2, k2tog, yo, k3, yo, ssk, k2, repeat from * to last 6 sts, p2, yo, k2tog, p2.
• Row 5: *P2, k2tog, yo, p2, k1, k2tog, yo, k5, yo, ssk, k1, repeat from * to last 6 sts, p2, k2tog, yo, p2.
• Row 7: *P2, yo, k2tog, p2, k0, k2tog, yo, k3, yo, k2tog, k2, yo, ssk, repeat from * to last 6 sts, p2, yo, k2tog, p2.
• Row 9: *P2, k2tog, yo, p2, k1, yo, ssk, k5, k2tog, yo, k1, repeat from * to last 6 sts, p2, k2tog, yo, p2.
• Row 11: *P2, yo, k2tog, p2, k2, yo, ssk, k3, k2tog, yo, k2, repeat from * to last 6 sts, p2, yo, k2tog, p2.
• Row 13: *P2, k2tog, yo, p2, k3, yo, ssk, k1, k2tog, yo, k3, repeat from * to last 6 sts, p2, k2tog, yo, p2.
• Row 15: *P2, yo, k2tog, p2, k4, yo, sl1-k2tog-psso, yo, k4, repeat from * to last 6 sts, p2, yo, k2tog, p2.
• Repeat rows 1-16.