Circular Placeholder

Preview:

Sample:

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Container(
          height: 120,
          width: 220,    
          child: CircularPlaceholder(
            color: Colors.green,
            strokeWidth: 3,
          ),
        ),
      ),
    );
  }
}