I was given a free pattern with some yarn i bought
it was a VERY BASIC Cable pattern
but I was supposed to Buy the yarn to get the pattern so i am not sure if I can share it here
this is one I have not done yet
but it is the one my baby sister learned cables on
and she LOVES the pattern
if you did not want to make it a keyhole scarf, you could just continue with the pattern till you are done
http://knitty.com/ISSUEwinter03/PATTtoddle.html
This one i know you do not have to buy, its just a basic link to the pattern
you will be Cabling so much, you will learn the basics pretty quickly
ecb