Shown with a cast-on count of 18 stitches.  

• Rows 1 and 9 (RS): *P2, k6, repeat from * to last 2 sts, p2.
• Rows 2, 4, 6, 8, 10, 12, 14, and 16: K2, *p6, k2, repeat from *.
• Row 3: *P2, yo, k2, ssk, k2, repeat from * to last 2 sts, p2.
• Row 5: *P2, k1, yo, k2, ssk, k1, repeat from * to last 2 sts, p2.
• Row 7: *P2, k2, yo, k2, ssk, repeat from * to last 2 sts, p2.
• Row 11: *P2, k2, k2tog, k2, yo, repeat from * to last 2 sts, p2.
• Row 13: *P2, k1, k2tog, k2, yo, k1, repeat from * to last 2 sts, p2.
• Row 15: *P2, k2tog, k2, yo, k2, repeat from * to last 2 sts, p2.
• Repeat rows 1-16.