Move move;
        int dx=0,dy=0;
        if(input.isKeyDown(Input.Key.LEFT))         dx=-1;
        else if(input.isKeyDown(Input.Key.RIGHT))   dx=1;

        if(input.isKeyDown(Input.Key.UP))         dy=-1;
        else if(input.isKeyDown(Input.Key.DOWN))   dy=1;



        if(dx==0 && dy==0)  this.ripley.getAnimation().stop();
        else{
            move=new Move(this.ripley,2,dx,dy);
            move.execute();
        }