how do i make a gui?

I tried to make it once and it never comes out right

To make a gui, make a screenGui and insert it into the starter gui, Now insert a frame into that screen gui and BAM you gots it

This is a pretty ambiguous question.

Making a GUI isn't as easy as it sounds. GUI's are usually very specific for a specific purpose.

I'm sure if you go on YouTube (or the Roblox Wiki for that matter) and search up "How to make a GUI ROBLOX", you'd find some nice tutorials on how to do so.