Spray Paint Generator (Link) is a nice graphical tool online that allows you to create animated emoticon smiley that paint a message on wall.
This is perfect and easy way to create GIF images to use as a logo in forums, emails, social networking sites like Facebook, in any website or email signature.
If you are a big fan of smileys or emoticons as they are usually also called, then this is the right tool for you. Just type a word or a sentence and click on the button. Simply right-click on the animated graphic and save to your computer.
You can now create images with up to 40 characters, allowing you to make longer messages and sentences. You now have the choice of 10 different backgrounds for your signature. This will allow you to create a signature you can use on sites with both light and dark background colors.