main.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter4Fun.com',
      theme: ThemeData(
        primarySwatch: Colors.yellow,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({Key key}) : super(key: key);

  @override
  _HomePageState createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  Widget build(BuildContext context) {
    return Scaffold(
      backgroundColor: Color(0xFF191636),
      body: Center(
        child: CustomPaint(
          painter: _OrbitPainter(),
          size: Size(300, 100),
        ),
      ),
    );
  }
}

class _OrbitPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    final center = Offset(size.width / 2, size.height / 2);
    final rect = Rect.fromCenter(center: center, width: size.width, height: size.height);
    canvas.drawOval(
      rect,
      Paint()
        ..color = Colors.white
        ..style = PaintingStyle.stroke
        ..strokeWidth = 1,
    );
  }

  @override
  bool shouldRepaint(covariant CustomPainter oldDelegate) => true;
}