WoW macros.scripts?

Been reading around and seeing a few things about how people's toons will do things under certain conditions that are preprogrammed.

What I'd like to be able to do is have Arianthe /pet Elder and say something to the affect of 'good boy!' after the finish of a fight, or maybe even a few random endearments.

Can anyone help me with that?

'For the kitty! Horde!' ;)

Happy Birthday, Melusine!

Hope it's a good one! :)