I don't typically make all my bindings on the bias, so when I do choose to do that, I pretty much have to re-invent the wheel. There many ways to go wrong with the technique for making bias bindings, and it is a wonderful opportunity for me to be all kinds of stupid.
The directions are kind of confusing, at least to my feeble brain. I have done it a number of times before, and if I prevail and use the brain cells I have left after decades of chardonnay consumption, I can usually do it again. Basically, you take a square of fabric and cut it in half on the diagonal. Then things get tricky. You sew a tooth shaped thing, which you open up and draw lines on. You make a tube like shape, but be sure to off-set the drawn lines and sew another seam. If you get this step wrong, you will end up with 20 circles of binding. Don't ask me how I know this. if you get it correct, when you cut on the lines, you will have a nice long strip of continuous bias binding. Works great if you can wrap your mind around the instructions.
My first set came out nicely. But it wasn't enough in length to go around the quilt. So I had to make another set. Only somehow I got the stripe going in the opposite direction with my second try.
What? No, are you kidding me? That is not the effect I am going for. I got it right on my third attempt, and managed to use more fabric making binding for one quilt than has ever been achieved in the history of quilting.