Shown with a cast-on count of 45 stitches.  

• Rows 1, 3, 5, 7, 9, 11, 13, 15, 17, 19, 21, 23, 25, and 27 (RS): Knit.
• Rows 2, 6, 10, and 14: *Yo, cddp, yo, p3, yo, cddp, yo, [p1, k1] 4 times, p1, repeat from * to last 9 sts, yo, cddp, yo, p3, yo, cddp, yo.
• Rows 4, 8, and 12: *P3, yo, cddp, yo, p3, [p1, k1] 4 times, p1, repeat from * to last 9 sts, p3, yo, cddp, yo, p3.
• Rows 16, 20, 24, and 28: *[P1, k1] 4 times, p1, yo, cddp, yo, p3, yo, cddp, yo, repeat from * to last 9 sts, [p1, k1] 4 times, p1.
• Rows 18, 22, and 26: *[P1, k1] 4 times, p1, p3, yo, cddp, yo, p3, repeat from * to last 9 sts, [p1, k1] 4 times, p1.