How to weave a belt.
Cut the yarn until you have 24 strands.  Then wrap them around a pencil. Bring the first strand of yarn under and over the other strands. Once you pull the next strand through, the previous strand goes over it. Eventually you will see the diagonal stripes.  Once you are done with one half and are ready to remove the pencil/dowel, it should be turned around rather than flipped over.  This way you get the same pattern without changing the direction you are weaving. When your finished you can braid the ends.