Cast on any number of sts
1st row: K
2nd row: K1, *put the needle in the next st as if you were going to knit it normally, instead, wind the wool around two fingers (and the needle) three times, then knit the stitch (you'll have a single st made with 3 strands of yarn). Return this st to the left hand needle and knit it again. Repeat from * to end of row.
If shorter loops are desired wind the yarn around one finger instead of two.