Exploring Stack And Indexed Stack Using Flutter Android App

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
        home: Scaffold(
            appBar: AppBar(
              backgroundColor: Colors.red,
                title: Text('Stack Widget')
            ),
            body: Center(
                child: StackWidget()
            )
        )
    );
  } }

class StackWidget extends StatefulWidget {
  @override
  _StackWidgetState createState() => _StackWidgetState();
}

class _StackWidgetState extends State<StackWidget> {
  @override
  void dispose() {
    super.dispose();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Stack(
        children: <Widget>[
          Container(
            color: Colors.deepOrangeAccent,
          ),
          Container(
            color: Colors.orange,
            height: 300.0,
            width: 300.0,
          ),
          Container(
            color: Colors.orange[100],
            height: 150.0,
            width: 150.0,
          )
        ],
      ),
    );
  }
}