R key= reset

I’m not very good at scripting and i need to know how i would make the scene reset it self when I press the R button. HOW DO I DO THIS?

Simply put

if (Input.GetKeyDown(KeyCode.R))
     Application.LoadLevel("SceneTitle");

if(input.GetKeyDown(varKeyInput)
{
Application.LoadLevel (Level);
}

public Keycode ResetKey = Keycode.r;
public string SceneName = “Input Scene”;
//wrote this in the forum not mono so there may be some errors
void Update(){
if(Input.GetKeyDown(ResetKey)){

Application.LoadLevel(SceneName);
}

}