import 'package:rocket_timer/rocket_timer.dart';
final RocketTimer timer = RocketTimer(duration: 60, type: TimerType.countdown);
// Start the timer
timer.start();
// Pause the timer
timer.pause();
// Stop the timer
timer.stop();
// Reset the timer
timer.reset();
// Switch between countdown and normal modes
timer.switchMode();
// Restart timer
timer.restart();

import 'package:flutter/material.dart';
import 'package:rocket_timer/rocket_timer.dart';
class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;
  @override
  _MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
  final RocketTimer _rocketTimer = RocketTimer(duration: 60, type: TimerType.countdown);
  @override
  void dispose() {
    _rocketTimer.dispose();
    super.dispose();
  }
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Center(
        child: RocketTimerBuilder(
          timer: _rocketTimer,
          builder: (BuildContext context) {
            return Text(
              _rocketTimer.formattedDuration,
              style: Theme.of(context).textTheme.headline1,
            );
          },
        ),
      ),
    );
  }
}