Sorry this took so long, and I'm sure your prom has past by now, but here it is: I just cut it all out by eye from looking at a bandana I kept next to me while listening to DJ Shadow on loop
As for you, I would suggest making large sheets of duct tape with no sticky side (stick sticky sides in of 2 pieces). Then cut them out like you would for a pattern to sew a similar garment, but instead of sewing the pannels you just stick them together with tape!