background image changing animation flutter - flutter

Question

I'm new to flutter and try to learn while developing apps on my own. I have created a get started screen using one background image. I want to change 2-3 background images while the other texts and get started button remain same. how can I do that using flutter. please refer the below code. appreciate your help on this.
import 'package:flutter/cupertino.dart';
import 'package:flutter/material.dart';
class GetStarted extends StatelessWidget {
const GetStarted({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return Scaffold(
body: Container(
color: Colors.black,
child: Stack(
children: [
Positioned.fill(
child: Opacity(
opacity: 0.8,
child:
Image.asset('assets/images/person1.png', fit: BoxFit.cover),
),
),
Container(
color: Color.fromRGBO(5, 65, 196, 0.19),
),
Padding(
padding: const EdgeInsets.only(left: 40,bottom: 230 ),
child: Align(
alignment: Alignment.bottomLeft,
child: Text('Meet \nYour Doctor\nHere', style:TextStyle(
height: 1.2,
fontFamily: 'Dubai',
fontSize: 35,
color:Color(0xffFAFAFA),
fontWeight: FontWeight.w500,
))),
),
Padding(
padding: const EdgeInsets.only(left: 30,top: 26),
child: Align(
alignment: Alignment.topLeft,
child: Text('DOCTOR', style:TextStyle(
fontFamily: 'Dubai',
fontSize: 30,
color:Colors.white,
fontWeight: FontWeight.w500,
))),
),
Padding(
padding: const EdgeInsets.only(bottom: 60),
child: Align(
alignment: Alignment.bottomCenter,
child: SizedBox(
width: 320,
height: 65,
child: ElevatedButton(
onPressed: () {
},
child: Text('Get Started',style:TextStyle(color:Colors.white,fontSize:25, fontWeight: FontWeight.normal),
),
style:ButtonStyle(
backgroundColor: MaterialStateProperty.all<Color>(Color(0xff05ABA3)),
shape: MaterialStateProperty.all<RoundedRectangleBorder>(
RoundedRectangleBorder(
borderRadius: BorderRadius.circular(50.0),
),
)
)
),
)
),
),
Padding(
padding: const EdgeInsets.only(bottom: 20),
child: Align(
alignment: Alignment.bottomCenter,
child: Container(
decoration: BoxDecoration(
borderRadius: BorderRadius.circular(5.0),
color: Colors.white,
),
height: 5,
width: 120,
)
)
),
],
),
),
);
}
}