Make three copies of the new made layer and apply Free Transform option to make the copies smaller on those places it is necessary.

Create Microsoft Windows Vista Wallpaper in Photoshop CS

The same instrument will help us to represent on the red sphere a central gleam.

Create Microsoft Windows Vista Wallpaper in Photoshop CS

Create Microsoft Windows Vista Wallpaper in Photoshop CS

Fill
0% on the layers.
Blending Options-Gradient Overlay

Create Microsoft Windows Vista Wallpaper in Photoshop CS

Gradient?s parameters:

Create Microsoft Windows Vista Wallpaper in Photoshop CS