No pattern but I love this "Crochet Cotton Necklace-green tones" by accessoriesbynez.
1 - Fold the cord, but some should be short (slightly longer than the actual length of the bracelet, and the other at least 1.30 m., which is what will become the fabric. You tie a knot, where then hook the carabiner. Then you have two ends, the short and long. For each tuck the same number of balls (and figure you, depending on the ball and the size of the bracelet). 2-3 - Hold the short end, and you rolling (out) with the long ball from one side and one from the other upwards, zigzag, up to...
this a cool idea, might be nice on a piece of stiffened fabric in the center for texture