Card & parsing - Flutter

import 'package:flutter/material.dart';

void main() {
  runApp(new MaterialApp(
    title: "Card & Parsing",
    home: HalSatu(),
  ));
}
class HalSatu extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return new Scaffold(
      appBar: new AppBar(
        title: new Text("Card & Parsing"),
      ),
      body: new Container(
        child: new Column(
          crossAxisAlignment: CrossAxisAlignment.stretch,
              children: <Widget>[
                new cardSaya(icon: Icons.home, warna: Colors.brown, text: "Home",),
                new cardSaya(icon: Icons.favorite, warna: Colors.pink, text: "Favorite",),
                new cardSaya(icon: Icons.place, warna: Colors.blue, text: "Place",),
                new cardSaya(icon: Icons.settings, warna: Colors.black, text: "Setting",)

          ],
        ),
      ),
    );
  }
}

class cardSaya extends StatelessWidget {

  cardSaya ({this.icon, this.text, this.warna});
  final IconData icon;
  final String text;
  final Color warna;

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return new Container(
      padding: new EdgeInsets.all(10.0),
      child: new Card(
          child: new Column(
        children: <Widget>[
          new Icon(icon, size: 50.0, color: warna),
          new Text(
            text,
            style: new TextStyle(fontSize: 20.0),
          )
        ],
      )),
    );
  }
}