How do i make a teleporter with a GUI screen?

Hello! My name is Veinsson, i am a builder so excuse me ( I don't know much about LUA) So i am currently working on a game together with my team, NCG Studio. And i do need some help! Since the head scripter for the game is on other stuff, i decided to figured this out on my own. So i am thinking of a teleporter with a GUI loading/black screen. It's inspired of Meepcity and other famous games. I have made a teleporter with a GUI screen but for some reason it does not work. Please feel free to send some help! My discord is: Vide#1111

while loop the screen transparency, and use :MoveTo(thepositionasavector3here) on the character model https://developer.roblox.com/en-us/api-reference/property/GuiObject/BackgroundTransparency

https://developer.roblox.com/en-us/api-reference/function/Model/MoveTo