how do u do them animated things when you send the messages when the animated things scroll at the bottom
AFAIK, questions regarding the forum itself belong in General Discussion.
Check the "BBCode and Smilies reference (http://www.adventuregamestudio.co.uk/yabb/YaBBHelp/posting.html)" when composing your message for what tags you can use.
Basically, just put
[move][img]http://www.yourserver.com/yourimage.gif[/img][/move]
in your signature line.
Remember there are also members with dial-up surfing the forums, so it was agreed on a size limit. Can't remember it, though. Just restrain yourself!