Abstract background graphic

My software needs a new abstract background for the registration window. I've attached an screen shot of an example registration window. I require three different unique backgrounds. They must be your own work and look good. Please use similar colors as contained in the example. All files must be able to be opened in Illustrator, with file format EPS. Artwork must be of type vector. This scope of work includes any adjustments/tweaks that may be required in order to produce a high quality backgrounds.