Код-ревью: анимация пульса

class _PulseState extends State<Pulse> with SingleTickerProviderStateMixin {
  late AnimationController _c;
  late AnimationController _glow;

  @override
  void initState() {
    super.initState();
    _c = AnimationController(vsync: this, duration: const Duration(seconds: 1))..repeat(reverse: true);
    _glow = AnimationController(vsync: this, duration: const Duration(seconds: 2))..repeat();
    _c.addListener(() => setState(() {}));
  }

  @override
  Widget build(BuildContext context) {
    return Opacity(
      opacity: 0.5 + _c.value / 2,
      child: Transform.scale(scale: 1 + _c.value * 0.1, child: const HeavyCard()),
    );
  }
}