Here are some backrounds I made using Photoshop, feel free to use them if you want, but I'd like you to please look at all the backrounds and vote for your favorite.
Dark Rising
Flash
Behind the Glass
Magic Dust
Also here's some other backrounds I've made (Will be updated when I make new ones)
Crystal Path
How to make these your desktop backround
1. First right click the image you want and click Copy Image
2. Some of the images aren't the size for the desktop, if the picture isn't 1200 x 1200 pixels, then load it in a picture editing thing and make it 1200 x 1200 pixels. Then right click it and click "Set as Desktop Backround"