Choose now the next instrument that we?ll use in two stages.
Create first a special sector (the element of volume). The first stage includes creating the first circle.
The second stage supposes to click on Alt button and applying the previous instrument to erase the unnecessary elements.

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

Make three copies of the new layer and change the parameters for all of them. Select Free Transform option to make the copies smaller, like it is demonstrated in this picture:

Create Microsoft Windows Vista Wallpaper in Photoshop CS