home_page.dart

...
          Consumer<ValueBloc>(
            builder: (BuildContext context, ValueBloc valueBloc) {
              return _textValue(valueBloc.value);
            },
          ),
          Container(
            height: 25,
          ),
          Consumer<ValueBloc>(
            builder: (BuildContext context, ValueBloc valueBloc) {
              return Slider(
              activeColor: Colors.white,
              inactiveColor: Colors.white,
              min: 0.0,
              max: 1.0,
              onChanged: valueBloc.onChangeValue,
              value: valueBloc.value);
            },
          ),
...