Need help on making loading screen

I’m pretty sure that there’s tons of youtube tutorials on this topic. A quick google search will do. As for the “fits for all devices” part, you should learn more about UDim2 and scales and offsets. There’s some helpful threads on the forum and the docs too. Lemme list them down for ya.

https://developer.roblox.com/en-us/articles/Intro-to-GUIs