Even if you are following a purchased pattern, the way you finish things off can make them individual or personal.
One way of detailing a craft project is to use a cord woven from colours to match the project.
These cords can also be used "as is", as bracelets or necklaces, or simply tied to things to add interest.
Step 1: The Weaving Disc.
Poke a hole in the middle, about quarter of an inch across (pencil-width is fine), and cut eight slots evenly around the edge of the card.
You may also find it easier to manipulate the cord in you cut a tiny V-shaped notch at the end of each slot.
It doesn't have to be an exact size, or an exact shape, so you can knock one together from any scrap card you have lying around.
Step 2: Starting the Cord.
The cords are easier to use with a loop at one end, so start with one piece of yarn as long as you need* and three pieces of yarn twice as long as that. The colours you use are up to you.
Fold the long yarn in half, lay the short yarn with them, and tie a knot at the folded end. This will make a small loop.
Thread the loose ends through the loom, pull the knot up to the hole, and spread the yarns out so that there is one piece in all but one of the slots.
The starting arrangement of the yarns will influence the pattern you get, but it will be generally helical.
*Weaving shortens the yarn by around a third (depending on the thickness of the yarn and how tight you weave it). Generally, an arm's length will become a choker-length. A bracelet needs seven lengths of around a foot (3x2 feet and 1x1 foot).
Step 3: Working the Cord.
Look at the loom, and mentally number the slots.
If the empty slot is "1", then lift "4" out of its slot, and place it in "1".
Renumber from the new empty slot, and carry on.
Make sure you keep working in the same direction (turnwise or widdershins), otherwise the pattern in your cord will be uneven (although you could, if you want, change direction at regular intervals to add a zig-zag to your helix).
Step 4: Finishing
If your cord is intended to be a bracelet or neck-thong, then double-tie the finishing knot. It can then be threaded through the starting loop as a simple catch.
You can, if you want, tie the knot, thread a large bead onto the remaining strands and tie a second knot to keep the bead on, then thread the bead through the loop.
It's up to you, really - be creative.
Finally, I have just discovered that this exact braid has been presented before, in a video by Mangetout. Sorry for stealing your thunder, Mangetout.