How to do it...

You are now going to use a Column widget and then a Stack widget to place elements on the screen:

1. In the profile_screen.dart file, import the material.dart library.
2. Type stless to create a new stateless widget, and call it  ProfileScreen:

import 'package:flutter/material.dart';

class ProfileScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container();
  }
}

3. In the main.dart  file, remove the MyHomePage class, and use the new ProfileScreen class as the home of MyApp: 

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: ProfileScreen(),
    );
  }
}

4. In the profile_screen.dart file, add this shell code. This won't do anything yet, but it gives us three places to add the elements for this screen:

class ProfileScreen extends StatelessWidget {
  @override
  Widget build(BuildContext context)...