Can someone help me with this

I have 3 intro pages, when user reaches the last intro page then i want it to be redirected auto to home page with a delay like 5 sec, or i would like to replace the icons with a button to redirect to homepage.

import 'package:flutter/material.dart';


class OnBoardMain extends StatelessWidget {
  OnBoardMain({super.key});
  final _controller = PageController();

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      extendBodyBehindAppBar: true,
      appBar: AppBar(backgroundColor: Colors.transparent),
      body: Column(
        children: [
          Expanded(
            child: PageView(
              controller: _controller,
              children: const [
                OnBoardScreen(),
                OnBoardScreen2(),
                OnBoardScreen3(),
              ],

              ///

              ///
            ),
          ),
          Padding(
            padding: const EdgeInsets.only(bottom: 50),
            child: SmoothPageIndicator(
              controller: _controller,
              count: 3,
              effect: const ExpandingDotsEffect(
                activeDotColor: Colors.black,
                dotColor: Colors.white,
                dotHeight: 8,
                dotWidth: 15,
              ),
            ),
          ),
        ],
      ),
    );
  }
}