需要帮助以每x秒更新一次flutter中的图表数据

dependencies:
  flutter:
    sdk: flutter
  charts_flutter: ^0.10.0

import 'package:flutter/material.dart';
import 'package:charts_flutter/flutter.dart' as charts;

class ChartWidget extends StatefulWidget {
  @override
  _ChartWidgetState createState() => _ChartWidgetState();
}

class _ChartWidgetState extends State<ChartWidget> {
  List<charts.Series> seriesList;

  @override
  void initState() {
    super.initState();
    seriesList = _createSampleData();
  }

  @override
  Widget build(BuildContext context) {
    return charts.LineChart(
      seriesList,
      animate: true,
    );
  }

  List<charts.Series<ChartData, DateTime>> _createSampleData() {
    final data = [
      ChartData(DateTime(2022, 1, 1), 5),
      ChartData(DateTime(2022, 1, 2), 10),
      ChartData(DateTime(2022, 1, 3), 15),
      // Add more data points here
    ];

    return [
      charts.Series<ChartData, DateTime>(
        id: 'Data',
        colorFn: (_, __) => charts.MaterialPalette.blue.shadeDefault,
        domainFn: (ChartData data, _) => data.time,
        measureFn: (ChartData data, _) => data.value,
        data: data,
      ),
    ];
  }
}

class ChartData {
  final DateTime time;
  final int value;

  ChartData(this.time, this.value);
}

import 'dart:async';

class _ChartWidgetState extends State<ChartWidget> {
  Timer _timer;
  List<charts.Series> seriesList;

  @override
  void initState() {
    super.initState();
    seriesList = _createSampleData();
    _startTimer();
  }

  @override
  void dispose() {
    _timer.cancel();
    super.dispose();
  }

  void _startTimer() {
    const duration = Duration(seconds: x);
    _timer = Timer.periodic(duration, (_) {
      setState(() {
        seriesList = _createSampleData();
      });
    });
  }

  // Rest of the code remains the same
}