I am trying to make this design from figma ui design and need to make the 2 pic inside each other but when i do it there is a space between them also the shaded part in the right pic how can i make it

but it did not work so It comes in this shape

import 'package:flutter/material.dart';
class HomeScreen extends StatelessWidget {
const HomeScreen({super.key});
@override
Widget build(BuildContext context) {
return Scaffold(
body: Stack(
children: [
Row(
children: [
Expanded(
child: Container(
width: 235,
height: 235,
decoration: const BoxDecoration(
image: DecorationImage(
image: AssetImage(
'assets/images/back1.png',
),
fit: BoxFit.cover,
),
),
),
),
Expanded(
child: Container(
width: 279,
height: 279,
decoration: const BoxDecoration(
image: DecorationImage(
image: AssetImage(
'assets/images/back1.png',
),
fit: BoxFit.cover,
),
),
),
),
],
),
],
),
);
}
}
So what widget or things to add to make the 2 pic mixed