anchor.diff:    var chartVisibility = false;
     var factor = 0.0;
     List<double> normalizedPeaks = [];
  -  var padding = EdgeInsets.all(16.0);
  +  double padding = 16.0;
   
     static final _BackgroundState _backgroundState = _BackgroundState();
   
  
positive.code:               decoration: BoxDecoration(
                  color: Theme.of(context).primaryColor,
                  borderRadius: BorderRadius.only(
                    bottomLeft: Radius.circular(32.0),
                    bottomRight: Radius.circular(32.0),
                  ),
                ),
              ),
  
negative.code: 
    // focuses the darker portion with padding
    void focus(bool focus) {
      this.padding = focus ? 0.0 : 16.0;
      this.setStateIfMounted();
    }
  
  