Make a long chain (as long as you'd like the scarf to be) , then double crochet into the 4th chain along. Keep Ch4 and double crochet in the corresponding loop in the chain below. You should end up with something that looks like the picture below.For alternate rows you do the same only replace the double crochets with single crochets. Keep going until the scarf is as thick as you want. I chose to stop with a skinny scarf so I could use it as a belt with my jeans.