如何在Flutter中制作一个缩放的开放动画？

import 'package:flutter/material.dart';

class ZoomAnimation extends StatefulWidget {
  @override
  _ZoomAnimationState createState() => _ZoomAnimationState();
}

class _ZoomAnimationState extends State<ZoomAnimation>
    with SingleTickerProviderStateMixin {
  AnimationController _controller;
  Animation<double> _animation;

  @override
  void initState() {
    super.initState();
    _controller = AnimationController(
      duration: Duration(seconds: 2),
      vsync: this,
    );
    _animation = Tween<double>(begin: 1.0, end: 2.0).animate(_controller);
    _controller.repeat(reverse: true);
  }

  @override
  void dispose() {
    _controller.dispose();
    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return AnimatedBuilder(
      animation: _animation,
      builder: (BuildContext context, Widget child) {
        return Transform.scale(
          scale: _animation.value,
          child: Container(
            width: 200,
            height: 200,
            color: Colors.blue,
          ),
        );
      },
    );
  }

void main() {
  runApp(MaterialApp(
    home: Scaffold(
      appBar: AppBar(
        title: Text('Zoom Animation'),
      ),
      body: Center(
        child: ZoomAnimation(),
      ),
    ),
  ));
}