2

function OnGUI () {
    // Make a background box
GUI.Box (Rect (10,10,300,90), "Do You Want To Go To the Next Level?");

    // Make the first button. If it is pressed, Application.Loadlevel (1) will be executed
    if (GUI.Button (Rect (130,40,80,20), "Yeah")) {
    Application.LoadLevel(1);
    }
    }