animation with bloc package on flutter - flutter

Question

please check my code I want to use this animation with the bloc package,
and also I want to use that without StatefulWidget class :
class LoadingScreen extends StatefulWidget {
const LoadingScreen({Key? key}) : super(key: key);
#override
State<LoadingScreen> createState() => _LoadingScreenState();
}
class _LoadingScreenState extends State<LoadingScreen>
with TickerProviderStateMixin {
late AnimationController controller;
late AnimationController controller2;
late Animation<Offset> disk;
late Animation<Offset> offset;
int diskPicW = 0;
#override
void initState() {
super.initState();
controller =
AnimationController(vsync: this, duration: Duration(seconds: 1));
controller2 = AnimationController(
vsync: this, duration: Duration(seconds: 1, milliseconds: 500));
offset = Tween<Offset>(begin: Offset(1.0, 0.0), end: Offset.zero)
.animate(controller);
disk = Tween<Offset>(begin: Offset(-1.0, 0.0), end: Offset.zero)
.animate(controller2);
controller.forward();
controller2.forward();
Timer(Duration(seconds: 2, milliseconds: 500), (() {
Navigator.push(
context,
MaterialPageRoute(
builder: (context) => FirstPage(),
));
}));
}
SizeController() {
setState(() {});
}
#override
void dispose() {
super.dispose();
controller.dispose();
controller2.dispose();
}
#override
Widget build(BuildContext context) {
print(MediaQuery.of(context).size.width);
print(MediaQuery.of(context).size.height);
return Scaffold(
backgroundColor: color3,
body: Stack(
children: [
SlideTransition(
position: offset,
child: Center(
child: Image.asset(
'assets/001.png',
width: 150,
height: 150,
),
),
),
SlideTransition(
position: disk,
child: AnimatedBuilder(
animation: controller2.view,
builder: (context, child) {
return Transform.rotate(
angle: controller2.value * 2 * pi,
child: child,
);
},
child: Center(
child: Image.asset(
'assets/disk2.png',
width: 130,
height: 130,
),
),
),
),
SlideTransition(
position: offset,
child: Center(
child: Image.asset(
'assets/002.png',
width: 150,
height: 150,
),
),
)
],
),
);
}
}
This is my simple animation code
How can I run this animation using the bloc package?
I want without using the StatefulWidget class make that
I want to use the bloc package and I don't know how
Please teach me, thank you