import 'package:flutter/material.dart';

​

void main() {

  runApp(MyApp());

}

​

class MyApp extends StatelessWidget {

  @override

  Widget build(BuildContext context) {

    return MaterialApp(

      home: Scaffold(

        appBar: AppBar(

          title: Text('Container Overlap Example'),

        ),

        body: Center(

          child: Stack(

            children: [

              Container(

                width: 200,

                height: 200,

                color: Colors.blue,

              ),

              Positioned(

                top: 50,

                left: 50,

                child: Container(

                  width: 100,

                  height: 100,

                  color: Colors.red,

                ),

              ),

            ],

          ),

        ),

      ),

    );

  }

}