TimerStop.dart

class TimerStopper extends StatelessWidget {
  final List<AnimationController> controllers;

  const TimerStopper({Key key, this.controllers}) : super(key: key);

  @override
  Widget build(BuildContext context) {
    return GestureDetector(
      onTap: () {
        controllers.forEach((controller) {
          if (controller.isAnimating) {
            controller.stop();
          } else {
            controller.repeat();
          }
        });
      },
      child: Container(
        decoration: BoxDecoration(
          color: Colors.transparent,
        ),
        width: MediaQuery
            .of(context)
            .size
            .width,
        height: MediaQuery
            .of(context)
            .size
            .height,      ),
    );
  }
}