How do you make a pictures pop up on your screen?

I am very new to scripting so i don't know much of the basics (if this is basic). I want have a way that you don't even see you character but a picture pops up on your screen and arrows to go on.

If maybe you give me more information on your problem I can think of a way to overcome it. Is it that you want a screen(like filled with blue) and arrows* on it? You have to make a big GUI for this.