Shown with a cast-on count of 27 stitches.  

• Row 1 (RS): K1, *k7, p1, k2, p1, repeat from * to last 4 sts, k4.
• Rows 2 and 22: K4, *k1, p2, k1, p7, repeat from * to last st, k1.
• Row 3: K1, *k6, p2tog, k1, kfb, p1, repeat from * to last 4 sts, k4.
• Rows 4 and 20: K4, *k1, p3, k1, p6, repeat from * to last st, k1.
• Row 5: K1, *k5, p2tog, k2, kfb, p1, repeat from * to last 4 sts, k4.
• Rows 6 and 18: K4, *k1, p4, k1, p5, repeat from * to last st, k1.
• Row 7: K1, *k4, p2tog, k3, kfb, p1, repeat from * to last 4 sts, k4.
• Rows 8 and 16: K4, *k1, p5, k1, p4, repeat from * to last st, k1.
• Row 9: K1, *k3, p2tog, k4, kfb, p1, repeat from * to last 4 sts, k4.
• Rows 10 and 14: K4, *k1, p6, k1, p3, repeat from * to last st, k1.
• Row 11: K1, *k2, p2tog, k5, kfb, p1, repeat from * to last 4 sts, k4.
• Row 12: K4, *k1, p7, k1, p2, repeat from * to last st, k1.
• Row 13: K1, *k1, kfb, p1, k6, p2tog, repeat from * to last 4 sts, k4.
• Row 15: K1, *k2, kfb, p1, k5, p2tog, repeat from * to last 4 sts, k4.
• Row 17: K1, *k3, kfb, p1, k4, p2tog, repeat from * to last 4 sts, k4.
• Row 19: K1, *k4, kfb, p1, k3, p2tog, repeat from * to last 4 sts, k4.
• Row 21: K1, *k5, kfb, p1, k2, p2tog, repeat from * to last 4 sts, k4.
• Repeat rows 3-22.