Go to www.tickerfactory.com and make one. After you make it, they will give you a bunch of pieces of code to choose from (long web-address looking thingies), I believe you need to choose the one that says it's for message boards (or something board-ish like that).
Leave that window open, open a new window and come to the Disboards in that new window. Over in the top left of the screen, inside the little black bar, see where it says User CP? Click that, then click "edit my signature" on the top left of the next page. From here you can add deelybobs and quotes and such to your signature. Copy that piece of code from tickerfactory and paste it into the box for your signature. When you are done adding things to your signature, be sure and click save or done or whatever it says at the bottom of the page.
Also be sure and read the sticky titled "Users check your signature" at the top of any thread here at the Dis. That thread explaind what is and isn't allowed in signatures.
Have a great day, and welcome to the Disboards!