These instructions are for a 5-stitch I-Cord.
Cast on 5 stitches, leaving a 6" tail. Next row K5, do not turn. *Next row Slip 5 sts back to left needle without twisting them, k1f&b, k4, do not turn. Rep from * until there are 5 more stitches on the right needle than the total number of cast-on stitches desired (and no stitches on the left needle). Place the first 5 stitches on the right needle onto a holder or bind them off, as the pattern indicates.