class ListViewConstructor extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return ListView(
      children: <Widget>[
        Container(color: Colors.red, height: 200,),
        Container(height: 20,),
        Container(color: Colors.red, height: 200,),
        Container(height: 20,),
        Container(color: Colors.red, height: 200,),
        Container(height: 20,),
      ],
    );
  }
}