delay in flutter

Future.delayed(Duration(milliseconds: 100), () {
  // Do something
});

Timer(Duration(seconds: 5), () {
  print(" This line is execute after 5 seconds");
});

Timer(Duration(seconds: 3), () {
  print("Yeah, this line is printed after 3 second");
});

// repeatedly :
Timer.periodic(Duration(seconds: 5), (timer) {
  print(DateTime.now());
});

Future.delayed(const Duration(milliseconds: 500), () {

// Here you can write your code

  setState(() {
    // Here you can write your code for open new view
  });

});

void main() async {
  print('Started at ${DateTime.now()}');
  final time = await Future.delayed(Duration(seconds: 2)).then((value) => DateTime.now());
  print('Awaited time was at $time');
}