anchor.diff:  
     @override
     Widget build(BuildContext context) {
  +    //_compositionLayer.progress = 0.0;
       return new CustomPaint(
  -        painter: new LottiePainter(_compositionLayer), size: const Size(200.0, 200.0));
  +        painter: new LottiePainter(_compositionLayer), size: const Size(1900.0, 700.0));
     }
   
     @override
  
positive.code:   @override
    void paint(Canvas canvas, Size size) {
      final matrix = new Matrix4.identity();
      leftScale(matrix, _scale, _scale);
  
      _compositionLayer.draw(canvas, size, matrix, _alpha);
    }
  
negative.code:   }
  
    void _handleChange() {
      setState(() {
        _compositionLayer.progress = _animation.value;
      });
  