import 'package:flutter/material.dart';

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: const Text("Welcome to flutter"),
      ),
    body: new Center(
      child: const Text("Hello world!"),
    ),
    );
  }

}

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.red,
      ),
      home: new Scaffold(
        appBar: new AppBar(
          title: const Text("Welcome to flutter"),
        ),
        body: new Center(
          child: const Text("Hello world!"),
        ),
      );,
    );
  }
}