I need to know how to make a Screen GUI with a Script?

Basically I need to know how to make a Screen GUI and Script so I can make a Banking System and in the banking system it must include the abilities to buy (with robux) currency (points) that can be used in game to buy cool objects and stuff

If you could give me some help with the scripting I would be extremely thankful if not please give me a hand with this thanks Many Thanks LordGeorgeCameron

[NOTE: This is not a request but a question with the option of helping me if the person can]

[TAGS: Scripts, Screen GUI, Developer Products, Marketplace Service]

[ALL HELP GIVEN NEEDS TO WORK WITH DEVELOPER PRODUCT]

Unless you have a very specific question about the script you're trying to make, I suggest you to check out this wiki article first, it contains everything you need to know to make a basic developer products system :

http://wiki.roblox.com/index.php?title=Developer_Products

Please,verify specifically what your trying to ask by showing proof.Such as showing a script to us or any such or a example a simple basic example showing how or what does it do.Any further I would say is to look at the roblox wiki for screen GUI thanks you.

hfgh