Shown with a cast-on count of 33 stitches.  

• Rows 1 and 7 (RS): P1, k1, p1, *[k3, p1] twice, k1, p1, repeat from *.
• Rows 2 and 6: P1, k1, *p3, k1, p1, k1, p3, k1, repeat from * to last st, p1.
• Rows 3 and 5: K4, *[p1, k1] twice, p1, k5, repeat from * to last 9 sts, [p1, k1] twice, p1, k4.
• Row 4: P3, *[k1, p1] 3 times, k1, p3, repeat from *.
• Rows 8 and 10: P1, k1, p1, *k1, p5, [k1, p1] twice, repeat from *.
• Row 9: [P1, k1] twice, *p1, k3, [p1, k1] 3 times, repeat from * to last 9 sts, p1, k3, [p1, k1] twice, p1.