FLASH LOADING SCREEN -help me plsss-

I want to make a flash animation. And I searched for some examples and saw that there are loading screens. I don't know how to make a loading screen can you help me guys?

I know only the basics about flash and i'm using Macromedia FlashMX

First I want to ask some questions:

1) What is the purpose of the Loading Screen?
2) Why should I make a Loading Screen?
3) Is it a requirement?
4) How can you make one?

Those are some of my questions.

Please help me Thanks

1) What is the purpose of the Loading Screen?

To give the user some information and keep her/his interest while the flash .swf loads. Anything over several K will take a moment to load, during which, the user may lose interest or think it's not loading right and move on.

2) Why should I make a Loading Screen?

Above. Also, it's just really good to keep communication up with the user, let 'em know you haven't forgotten about 'em.

3) Is it a requirement?

Definitely not a requirement, but if you have a large .swf (especially if it's over 50k), you really ought to or you're going to lose user interest and it'll look bad.

4) How can you make one?

this is a great tutorial:
http://www.kirupa.com/developer/mx/perc ... loader.htm

well thanks a lot now I undestand