Flutter multiple using Navigator.of(context).overlay not working - flutter

Question

this below code is simple dialog implementation to show and hide Container after click on button to show, that work fine, after click on dialog to hide container work too, now i want to show again container with Navigator.of(context).overlay, it doesn't work
full source code:
import 'package:flutter/material.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(home: Home());
}
}
class Home extends StatelessWidget {
#override
Widget build(BuildContext context) {
return Scaffold(
body: Directionality(
textDirection: TextDirection.rtl,
child: Center(
child: RaisedButton.icon(
icon: Icon(Icons.notifications_active),
label: Text('Notify!'),
onPressed: () {
Navigator.of(context).overlay.insert(OverlayEntry(builder: (BuildContext context) {
return SlidingLayer();
}));
},
),
),
),
);
}
}
class SlidingLayer extends StatefulWidget {
#override
State<StatefulWidget> createState() => SlidingLayerState();
}
class SlidingLayerState extends State<SlidingLayer> with SingleTickerProviderStateMixin {
AnimationController controller;
Animation<Offset> position;
#override
void initState() {
super.initState();
controller = AnimationController(vsync: this, duration: Duration(milliseconds: 750));
position = Tween<Offset>(begin: Offset(0.0, -14.0), end: Offset.zero).animate(CurvedAnimation(parent: controller, curve: Curves.ease));
controller.forward();
}
#override
Widget build(BuildContext context) {
return Material(
color: Colors.transparent,
child: Align(
alignment: Alignment.topCenter,
child: Padding(
padding: EdgeInsets.only(top: 90.0),
child: SlideTransition(
position: position,
child: Container(
margin: EdgeInsets.all(10.0),
height: 150.0,
width: double.infinity,
decoration: BoxDecoration(color: Colors.white, borderRadius: BorderRadius.circular(10.0), boxShadow: [
BoxShadow(
color: Colors.black26,
blurRadius: 0.9,
spreadRadius: 0.5,
offset: Offset(0.0, 0.0),
),
]),
child: InkWell(
onTap: (){
controller.reverse();
},
child: Center(
child: Text(
'ssss',
style: TextStyle(
fontSize: 26.0,
),
),
),
),
)),
),
),
);
}
}