This is a Drawing of Myanmar Flag written in Dart.

flutter_myanmar_flag.dart

// Copyright (c) 2020, Thiha Aye Kyaw.

import 'package:flutter/material.dart';

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.deepOrange,
      ),
      home: MyHomePage(title: 'Myanmar Flag in Dart'),
    );
  }
}

class _StarClipper extends CustomClipper<Path> {
  @override
  Path getClip(Size size) {
    final path = Path();
    path.lineTo(size.width * 0.5, size.height * 0.175);
    path.lineTo(size.width * 0.45, size.height * 0.4);
    path.lineTo(size.width * 0.30, size.height * 0.4);
    path.lineTo(size.width * 0.425, size.height * 0.55);
    path.lineTo(size.width * 0.375, size.height * 0.8);
    path.lineTo(size.width * 0.5, size.height * 0.65);
    path.lineTo(size.width * 0.625, size.height * 0.8);
    path.lineTo(size.width * 0.575, size.height * 0.55);
    path.lineTo(size.width * 0.70, size.height * 0.4);
    path.lineTo(size.width * 0.55, size.height * 0.4);
    path.lineTo(size.width * 0.5, size.height * 0.175);

    path.close();
    return path;
  }

  @override
  bool shouldReclip(CustomClipper<Path> oldClipper) => false;
}

class MyHomePage extends StatefulWidget {
  MyHomePage({Key key, this.title}) : super(key: key);

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: Container(
          width: 350,
          height: 200,
          margin: EdgeInsets.all(16.0),
          child: Stack(
            children: [
              Positioned.fill(
                child: Column(
                  mainAxisSize: MainAxisSize.min,
                  mainAxisAlignment: MainAxisAlignment.center,
                  children: <Widget>[
                    Container(
                      color: MMFlagColors().mmYellow,
                      height: 50,
                      width: 250,
                    ),
                    Container(
                      color: MMFlagColors().mmGreen,
                      height: 50,
                      width: 250,
                    ),
                    Container(
                      color: MMFlagColors().mmRed,
                      height: 50,
                      width: 250,
                    ),
                  ],
                ),
              ),
              Positioned.fill(
                child: ClipPath(
                  child: Container(
                    color: Colors.white,
                  ),
                  clipper: _StarClipper(),
                ),
              ),
              
            ],
          ),
        ),
      ),
    );
  }
}

class MMFlagColors {
  // According to Wikipedia, Myanmar Flag's colors are as follows.
  Color mmYellow = Color(0xffFECB00);
  Color mmGreen = Color(0xff34B233);
  Color mmRed = Color(0xffEA2839);
}