Codemash Flutter Demo 1

main.dart

import 'package:flutter/material.dart';

final Color darkBlue = Color.fromARGB(255, 18, 32, 47);

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData.dark().copyWith(scaffoldBackgroundColor: darkBlue),
      debugShowCheckedModeBanner: true,
      home: Scaffold(
        body: Center(
          child: MyWidget(),
        ),
      ),
    );
  }
}

class MyWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
//constraints: BoxConstraints.expand(width: 200, height: 200),
//         color: Colors.white,
        child: Center(        
            child: Column(
                mainAxisAlignment: MainAxisAlignment.center,
                children: <Widget>[
              Text('Hello, World!'),
              RaisedButton(
                  child: Text('Press me!'),
                  onPressed: () {
                    //do nothing for now
                  }),
            ])));
  }
}