How do I change the look of each team?

I know this isn't a request site but i'm very new to scripting but how do I make all the players on one team look a certain way and all the players on the other team look a different way also

What you would have to do would have a Nuetural spawnpoint, with a teamchanger gui sort of thing. And when the teamchanger gui was clicked, chang the character's appearance cooresponding to the button they clicked. This is all the help you will get on this. Please do not ask for requests in the future, try it yourself at first then if you have any problems along the way come here. Thank you.

-Goulstem