import 'dart:async';

import 'package:flutter/widgets.dart';

int acolor(int index, int offset) =>
    0xAA000000 + (0xFFFFFF ~/ (index + offset + 1));

Widget pic() => new Opacity(
    opacity: 0.9,
    child: new Image.network(
        'https://flutter.io/images/flutter-mark-square-100.png', // .asset('packages/armadillo/res/Armadillo.png',
        alignment: FractionalOffset.topCenter,
        fit: ImageFit.cover));

Widget colorized(int color, [Widget child = null]) => new Container(
    decoration: new BoxDecoration(backgroundColor: new Color(color)),
    child: child);

Widget fittedBox(i) => new Container(
    margin: new EdgeInsets.symmetric(vertical: 10.0),
    child: new SizedBox(
      width: 300.0,
      height: 400.0,
      child:
          new Column(crossAxisAlignment: CrossAxisAlignment.stretch, children: [
        new SizedBox(height: 50.0, child: colorized(acolor(i, 0))),
        new Flex(children: [
          colorized(
              acolor(i, 1),
              new SizedBox(
                  width: 300.0,
                  height: 350.0,
                  child: new FittedBox(
                      fit: ImageFit.cover,
                      alignment: FractionalOffset.topCenter,
                      child: new SizedBox(
                          width: 500.0, height: 1000.0, child: pic()))))
        ])
      ]),
    ));

Future main() async {
  runApp(new Center(
      child: new SizedBox(
          width: 300.0,
          child: new Block(children: new List.generate(2, fittedBox)))));
}