import 'package:flutter/material.dart';

void main() {
  runApp(const FlutterDemo());
}

class FlutterDemo extends StatelessWidget {
  const FlutterDemo({super.key});

  @override
  Widget build(BuildContext context) {
    return const MaterialApp(
      home: _FlutteDemo(),
    );
  }
}

class _FlutteDemo extends StatefulWidget {
  const _FlutteDemo();

  @override
  State<_FlutteDemo> createState() => _FlutteDemoState();
}

class _FlutteDemoState extends State<_FlutteDemo> {
  List<Widget> widgets = [];

  @override
  void initState() {
    super.initState();
    for (int i = 0; i < 200; i++) {
      widgets.add(Container(
        height: 50,
        width: 70,
        decoration: BoxDecoration(border: Border.all(color: Colors.black)),
        child: Text(i.toString()),
      ));
    }
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
        appBar: AppBar(title: const Text('Flutter Sample')),
        body: SingleChildScrollView(
          child: Row(
            children: [
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
              Column(children: widgets),
            ],
          ),
        ));
  }
}