How To Implement Flutter ListView Builder Horizontal

import 'package:flutter/material.dart';
void main() {
  runApp(MyApp());
}
class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      debugShowCheckedModeBanner: false,
      home: Homepage(),
    );
  }
}
class Homepage extends StatefulWidget {
  @override
  State<Homepage> createState() => _HomepageState();
}
class _HomepageState extends State<Homepage> {
  @override
  Widget build(BuildContext context) {
    return SafeArea(
        child: Scaffold(
            body: Container(
      height: 150,
      child: ListView.builder(
          scrollDirection: Axis.horizontal,
          itemBuilder: (context, index) {
            return Container(
              height: 200,
              margin: EdgeInsets.all(20),
              decoration: BoxDecoration(
                  boxShadow: [BoxShadow(blurRadius: 3, color: Colors.black26)],
                  borderRadius: BorderRadius.circular(100),
                  color: Colors.green),
              child: Container(
                height: 100,
                width: 100,
                margin: EdgeInsets.all(10),
                decoration: BoxDecoration(
                    borderRadius: BorderRadius.circular(20),
                    color: Colors.white),
                child: Container(
                  height: 100,
                  width: 100,
                  margin: EdgeInsets.all(10),
                  decoration: BoxDecoration(boxShadow: [
                    BoxShadow(
                        blurRadius: 5, spreadRadius: 2, color: Colors.black38)
                  ], shape: BoxShape.circle, color: Colors.green),
                ),
              ),
            );
          }),
    )));
  }
}

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