ITWEEN make rewind et read step by step

HI

I want make a guibuton for make rewind et read step by step ( example 1 seconde by 1 seconde).
I have this script for pause, resume and stop

public var target_Path1 : GameObject;
private var tabt : Transform[];





function SetPath (pathObject : GameObject)
{
var id : int = 0;
tabt =null;
tabt = new Transform[pathObject.transform.childCount];
for(var child: Transform in pathObject.transform)
     {
tabt[id++] = child.transform;
     }
iTween.MoveTo(gameObject, iTween.Hash("path", tabt, "time",30, "easetype", iTween.EaseType.linear,"looptype", iTween.LoopType.loop, "orienttopath", true));

} 


function OnGUI()
{

    if(GUI.Button(Rect(310,80,100,20), "commencer"))
	{
		
		SetPath(target_Path1);
		
	}


    if(GUI.Button(Rect(410,80,100,20), "Pause"))
      {
      iTween.Pause(gameObject);
        }

if(GUI.Button(Rect(510,80,100,20), "Reprise"))
       {
       iTween.Resume(gameObject);
        }

if(GUI.Button(Rect(610,80,100,20), "Stop"))
       {
        iTween.Stop(gameObject);
        }
}

I don’t believe there is any way to do this within the context of a iTween.MoveTo(). What you can do is implement your own move functionality using iTween.PutOnPath() and/or iTween.PointOnPath(). The last parameter for each of these two functions is the fraction around the path. A value of 0.0 places the object at the beginning of the path. A 1.0 places the object at the end of the path. For your rewind, you would have to calculate or save the faction for each rewind position and change the fraction you pass to PutOnPath() or PointOnPath().