(Belajar Flutter) Flexible Widget + ANimated Container

import 'dart:math';

import 'package:flutter/material.dart';

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

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  Random random = Random();
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("Flexible Layout"),
        ),
        body: Column(
          children: <Widget>[
            Flexible(
              child: Row(
                children: <Widget>[
                  Flexible(
                      flex: random.nextInt(2),
                      child: GestureDetector(
                        onTap: () {
                          setState(() {});
                        },
                        child: AnimatedContainer(
                          margin: EdgeInsets.all(5),
                          color: Color.fromARGB(255, random.nextInt(256),
                              random.nextInt(256), random.nextInt(256)),
                          duration: Duration(seconds: 1),
                        ),
                      )),
                  Flexible(
                      flex: random.nextInt(2),
                      child: GestureDetector(
                        onTap: () {
                          setState(() {});
                        },
                        child: AnimatedContainer(
                          margin: EdgeInsets.all(5),
                          color: Color.fromARGB(255, random.nextInt(256),
                              random.nextInt(256), random.nextInt(256)),
                          duration: Duration(seconds: 1),
                        ),
                      )),
                  Flexible(
                      flex: random.nextInt(2),
                      child: GestureDetector(
                        onTap: () {
                          setState(() {});
                        },
                        child: AnimatedContainer(
                          margin: EdgeInsets.all(5),
                          color: Color.fromARGB(255, random.nextInt(256),
                              random.nextInt(256), random.nextInt(256)),
                          duration: Duration(seconds: 1),
                        ),
                      ))
                ],
              ),
            ),
            Flexible(
                flex: random.nextInt(2),
                child: GestureDetector(
                  onTap: () {
                    setState(() {});
                  },
                  child: AnimatedContainer(
                    margin: EdgeInsets.all(5),
                    color: Color.fromARGB(255, random.nextInt(256),
                        random.nextInt(256), random.nextInt(256)),
                    duration: Duration(seconds: 1),
                  ),
                )),
            Flexible(
                flex: random.nextInt(2),
                child: GestureDetector(
                  onTap: () {
                    setState(() {});
                  },
                  child: AnimatedContainer(
                    margin: EdgeInsets.all(5),
                    color: Color.fromARGB(255, random.nextInt(256),
                        random.nextInt(256), random.nextInt(256)),
                    duration: Duration(seconds: 1),
                  ),
                ))
          ],
        ),
      ),
    );
  }
}