YOU WILL NEED
One pair recommended needle size for the yarn you are using
k = knit; p = purl; rep = repeat; RSF = right side facing; st(s) = stitch(es); yfd = yarn forward
Multiple of 3sts + 1 st
1st row: RSF, p1, (k2, p1) to end.
2nd row: K1, (yfd, k2, slip the yfd over the 2 k sts, k1) to end.
Rep these 2 rows.