progress bar script Load level :( HELP

Hello sorry for my french :/ I followed a tutorial to create a progress bar are not my script to load a NIVAUX :/ I is not what to do or meter :/ I need your help called me the code to load the meter :/ level of games thank you youtube video:

http://www.youtube.com/watch?v=-tmjnoe-dqI

var progress : float = 0; var pos : Vector2 = new Vector2(20,40); var size : Vector2 = new Vector2(60,20); var progressBarEmpty : Texture2D; var progressBarFull : Texture2D;

  function OnGUI()
 {
     GUI.DrawTexture(Rect(pos.x, pos.y, size.x, size.y), progressBarEmpty);
     GUI.DrawTexture(Rect(pos.x, pos.y, size.x * Mathf.Clamp01(progress), size.y), progressBarFull);
 } 
  
 function Update()
 {
 
     progress = Time.time * 0.05; 
        
     
 }