This is a very noob question but how do you save different levels off in Unity. I was creating a gui but couldn’t understand where it was calling to and where it gets specified within unity. For instance within the code bit below, where would the 1 be pointing two? Am I suppose to specify this somewhere within Unity or is this calling out to external files? Mostly I just want to know where the 1 points to in this code bit so that I know how to utilize it within the gui.
if (GUI.Button (Rect (70,40,80,20), "Start")){
Application.LoadLevel (1);
}