states.dart

import 'package:flutter/material.dart';
  
void main() => runApp();

// Stateless Widget
class BallPage extends StatelessWidget {
const BallPage({Key? key}) : super(key: key);
@override
Widget build(BuildContext context) {
return MaterialApp();
}
}

// Stateful Widget
class Ball extends StatefulWidget {
const Ball({Key? key}) : super(key: key);
@override
State<Ball> createState() => _BallState();
}

class _BallState extends State<Ball> {
@override
Widget build(BuildContext context) {
return Center();
}
}