Okay, so I got this script off of the unity website, but how do I make it fill up the whole screen? So here's the script;

/* Example level loader */

function OnGUI () {
    // Make a background box
    GUI.Box (Rect (10,10,100,90), "Menu");

    // Make the first button. If it is pressed, Application.Loadlevel (1) will be executed
    if (GUI.Button (Rect (20,40,80,20), "Play")) {
        Application.LoadLevel (1);
    }

    // Make the second button.
    if (GUI.Button (Rect (20,70,80,20), "Menu")) {
        Application.LoadLevel (0);
    }
}

This is probably a simple question, but I really need it. And make sure the text is bigger too. Thanks!