Custom marker with dart paint

marker_draw.dart

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Custom marker',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: Center(
          child: Stack(
            alignment: Alignment.center,
            children: [
              CustomPaint(
                size: const Size(70, 70),
                painter: ShapesPainter(),
              ),
              const Icon(Icons.masks, color: Colors.white)
            ],
          ),
        ),
      ),
    );
  }
}

class ShapesPainter extends CustomPainter {
  @override
  void paint(Canvas canvas, Size size) {
    final paint = Paint();
    // set the color property of the paint
    paint.color = Colors.deepOrange;
    // center of the canvas is (x,y) => (width/2, height/2)
    Offset center = Offset(size.width / 2, size.width / 2.4);
    double radius = size.width / 2.5;

    final paint2 = Paint();
    paint2.color = Colors.deepOrange;
    paint2.style = PaintingStyle.fill;

    Path path = Path();
    path.moveTo(size.width / 2, size.height);
    path.lineTo(size.width / 8, size.width / 1.8);
    path.lineTo(7 * size.width / 8, size.width / 1.8);
    path.close();

    // draw the circle on centre of canvas having radius 75.0
    canvas.drawCircle(center, radius, paint);

    canvas.drawPath(path, paint2);
  }

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