This tutorial is supposed to teach you how to make macrame bands in different styles. They can be used as bracelets, belts, or just for decoration. Under each image I will indicate what knot you need to make the band.
Interweave Cable Stitch – Crochet Stitch Tutorial Crochet tutorial that teaches you how to the Interweave Cable crochet stitch. This is great for spring if you just change the size of the stitch from double … source
i think you could make this with tunisian. when it gets the the split, you could keep working half the stitches until both halves are long enough and then start stitching across the entire piece again at the other end.