future delayed flutter

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

await Future.delayed(const Duration(seconds: 2), (){});

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

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

// Here you can write your code

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

});