home.dart

class HomeScreen extends StatefulWidget {
  @override
  _HomeScreenState createState() => _HomeScreenState();
}

class _HomeScreenState extends State<HomeScreen>
    with SingleTickerProviderStateMixin {

  AnimationController _animationController;
  
  @override
  void initState() {
     super.initState();
    _animationController = AnimationController(vsync: this, duration: Duration(seconds: 1));
    _animationController.addListener((){
		  setState((){});
	  });
    _animationController.forward();
  }
  
  @override
  void dispose() {
     super.dispose();
    _animationController.dispose();
  } 
}