How Do I Make A Death Screen Or Random Pop-Ups?

If you want to make a random thing, you should research into ~~~~~~~~~~~~~~~~~ math.random() ~~~~~~~~~~~~~~~~~ You should use it in the way that if a number is = to or < / > than then make the GUI visible.

ROBLOX math can be complicated at first, it requires time and patience.

DevSparkle is to nice and he should be saying this is not a requesting place. We help you fix scripts not make them. Whats the point of making a game that we made like seriously. There so go and learn lua.

The way to make things appear on your screen is Gui, or goo-ey. (It's an acronym so don't ask me why it's pronounced like that.)

It would take a very long time to explain so I'm just going to link you to a wiki-tutorial.

http://wiki.roblox.com/index.php?title=Beginner%27s_GUI_Tutorial