How do you make a GUI move on x, and y axis (x and y, as in variables)??

A gui that moves up, and down, but you can fire it as a function in a game script. Like if it was to say "The game is going to begin", it would fire the function, so it'd move left, or right, then it'd say "Text", and you can choose as a function what it's going to say like

How would you make it look like it's animated? But the movement of it, on y, to x.

function op1()
game.StarterGUI.Randomgui.Text = ""
end
function op2 ---- etc.....

How would this work? I don't need to know the options, and how to fire and change the text, right now I'm aiming towards how you would move the GUI, and make it like it's animated.. It's confusing, could somebody explain it to me in a simple as can be way?