Drag and drop texture

Hi, im working on a script to grab a texture using mouse and move it throught the screen. I want to move different textures to order it.

I have:

void OnGUI() {

if(cont<1) { rect= new Rect(rectx,recty,100,100); } GUI.DrawTexture(rect,Formula1); if(rect.Contains(Event.current.mousePosition)) {

         if(Event.current.type == EventType.MouseDrag)
         {

             Vector2 tempDelta = Event.current.delta;
             rectx=tempDelta.x +rectx;
             recty=tempDelta.y +recty;
             rect = new Rect(rectx,recty,100,100);
             cont=1;
             //transform.Translate (tempDelta*-0.05f);
         }
     }

 }

With this i can move the texture but always without moving out of the texture or it stops. How can i fix it?

Thanks