This tutorial will show you how to design nice floral wallpaper.
Create a new file with
1600x1200 px and
72 dpi. Using the next tool

, create the first background’s layer for the picture to be next.
Fill 0% on the layers.
Blending Options-Gradient Overlay
Gradient’s parameters: 
Select the next tool

and represent the next layer of the background.
Fill 0% on the layers.