epilogue-code-widget.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Scaffold(
        body: SmoothWidget(),
      ),
    );
  }
}

class SmoothWidget extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Container(
        width: 200.0,
        height: 200.0,
        decoration: BoxDecoration(
          borderRadius: BorderRadius.circular(25.0),
          color: Colors.cyan,
          border: Border.all(color: Colors.black, width: 6.0),
        ),
        child: Center(
          child: Text(
            "Hello World",
            style: TextStyle(
                fontSize: 26.0,
                fontStyle: FontStyle.italic,
                fontWeight: FontWeight.bold,
                color: Colors.amber),
          ),
        ),
    );
  }
}