Create your own Wallpaper #1 : Rainbow

There are so many ways on creating nice HD wallpapers yourself in Photoshop, so I figured I would post a tutorial series on it. Today starting with a rainbow/spectrum wallpaper. I've seen alot of abstract wallpapers that look like this but here's how you create one yourself that is fully customizable to your own tastes.

So this is what a result could look like after following this tutorial :

• First step as always create a new File in Photoshop with the resolution of your current screen resolution ( mine's 1920x1080 px )
• Unlock your Background layer by double clicking on it 
• Select the Gradient Tool (Hotkey : G) and create a black and white gradient form the bottom to the top. To do so click somewhere on the bottom of the image, hold shift and drag up until the upper edge of your background. 
• You should be looking at something like this  : 

• Next go to Filter > Distort > Wave
• In the upcoming window change the number of generators to 10 and the Type to "Square" and press OK.

Result so far :