how can create touch screen android scroll in unity3d?

I want to create an Android game with Unity3d. This game has an upgrade list with a touchable scroll. I use this code to create that but when I move finger in touch screen, scroll move hard and with a jump, I want it to move softly and like Android effects.

scrollPosition1 = GUI.BeginScrollView(Rect (0,400,Screen.width,175), 
                                      scrollPosition1, Rect (0, 0, 650, 0)); 
    // touch screen 
    if(Input.touchCount==1 && 
       Screen.height -Input.GetTouch(0).position.y >  450 - scrollPositionHome.y && 
       Screen.height - Input.GetTouch(0).position.y < 600 - scrollPositionHome.y)
    {
        var touchDelta2 : Vector2 = Input.GetTouch(0).deltaPosition;
        scrollPosition1.x +=touchDelta2.x;
    }

    for (i=0;i < ImgSliderProducts.Length;i++)
    {
        GUI.DrawTexture(Rect(20+(i* 100),10,100,100), 
                        ImgSliderProducts[i],ScaleMode.ScaleToFit,true);
    }

GUI.EndScrollView();