You will need some material (I used different colour polyesters as it has a nice shine), some binding tape, some cotton (that matches your binding tape) and some scissors... You will also need either a sewing machine (as I have used) or if you don't have access to a sewing machine you can use an iron on hemming tape such as this.
One >> To begin you need to need to cut out your triangles, use the first one as a template to cut around the others so that they are all the same size and shape. Once done lay them all out in piles of the same colours in the order that you want them then you can go through the pile picking one colour, then the next, then the next and so on so eventually you end up with one big pile of triangles in the order you'd like them to appear in finished your bunting. This will make it easier when it comes to sewing (or ironing) them.
Two >> Take your first triangle, unravel your tape and set the tape ready for sewing (or ironing) in place at the top of the triangle. Be sure to leaving a little extra at the end for tying your bunting up. To set the tape in place you will need to fold it in half length ways and press it flat with your hand. The reason I use binding tape (as opposed to ribbon) is because it is quite stiff and pretty much stays in place when you fold it.
Three >> Using the cotton that matches your binding tape you can now begin to sew your triangles to your tape.
Four >> I used a simple straight stitch to sew with. If you don't have access to a sewing machine you can use iron on hemming tape such as this which is just as effective if a little more fiddly.
Five >> Keep adding your triangles and sewing them to the tape. This is why having your pile of triangles in order next to your machine is a good idea as it means you can just sew away.
Six >> You are finished!
Seven >> Now you can go hang your bunting up and admire it blowing in the wind!