here’s a flutter package called circular_countdown_timer , I want to change its timer state by giving a costum variable, to make it clear I’ve created a simple page which containg just the very widget and a button to change its state ! for testing also I’ve putted a **color **changer which is working fine but the **timer **variable is not changing. could you please teach me more on how to resolve this kind of issue . thank you in advanced

import 'package:circular_countdown_timer/circular_countdown_timer.dart';
import 'package:flutter/material.dart';

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({super.key});

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const MyHomePage(),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({
    super.key,
  });

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  Color fillColor = Colors.black;
  int duration = 500;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      body: Center(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            CircularCountDownTimer(
                isReverse: true,
                textStyle: TextStyle(fontSize: 40),
                strokeWidth: 13,
                width: 200,
                height: 200,
                duration: duration,
                fillColor: fillColor,
                ringColor: Colors.blue),
            Padding(
              padding: const EdgeInsets.all(28.0),
              child: ElevatedButton(
                  onPressed: () {
                    setState(() {
                      fillColor = fillColor == Colors.redAccent
                          ? Colors.black
                          : Colors.redAccent;
                      duration = duration == 800 ? 500 : 800;
                    });
                  },
                  child: Text('Press !')),
            )
          ],
        ),
      ),
    );
  }
}