Trick to change the colour of facebook

Most of people use the facebook. Can you know, you can change the colour of  facebook. It is a trick and the steps are:
You need to these things for use this trick.
1. Mozilla Firefox Browser
2. Greasemonkey Addon
3. Facebook Script

STEPS:
1. Open Mozilla Firefox
2. Now you have to install Greasemonkey Addon. Download it and add to firefox.
3. Then Restart the Firefox.
4. Now you have to install Facebook Script and restart the firefox again.
5. Now go to Facebook.com and login to your account.
6. Now go Tools>Greasemonkey> User Script Commands> Customize Facebook
Note: In Firefox 4, you can view menu by pressing ALT button.
You can know change the colour and click set.