Help with something...

Maybe this is a dumb question, but does anyone know how to get a like button of facebook?! On the facebook developers page, you put your info in, and it gives you a code. Then it doesn't tell you where to paste it! I've tried pasting it several places but it does not work. I can find plenty of info on how to put a like button on a different website (I mean like how Pepsi can have a facebook like button on their actual website, for example), but I can't find any info anywhere on where to paste the damn code to simply put a like button on your facebook page.

Anyone know where to paste the code???