Bukkit API Timers and Counters

Countdown.java

import org.bukkit.Bukkit;
import org.bukkit.scheduler.BukkitTask;

public class Countdown {

    private int seconds;
    private BukkitTask task;

    public Countdown(int seconds) {
        this.seconds = seconds;
    }

    public void start() {
        task = Bukkit.getScheduler().runTaskTimerAsynchronously(Bukkit.getPluginManager().getPlugin("YourPlugin"), () -> {
            if (seconds <= 0) {
                // Countdown is complete
                task.cancel();
                return;
            }

            // Broadcast the remaining time to all players
            Bukkit.broadcastMessage("There are " + seconds + " seconds remaining until the countdown is complete.");

            seconds -= 1;
        }, 0L, 20L);
    }

    public void cancel() {
        if (task != null) {
            task.cancel();
        }
    }
}

Countdown.kt

@file:Suppress("KDocMissingDocumentation", "ReplaceNotNullAssertionWithElvisReturn")
package intelliractive.printer2

import net.kyori.adventure.text.Component
import net.kyori.adventure.text.format.TextColor
import org.bukkit.Bukkit
import org.bukkit.Bukkit.getOnlinePlayers
import org.bukkit.Location
import org.bukkit.entity.Player
import org.bukkit.scheduler.BukkitRunnable
/** #### Game Countdown*/
class Countdown(override var seconds: Int): Timer(seconds){
    override var state: String = "on"
    override fun start() {
        object : BukkitRunnable() {
            override fun run() {
                if (seconds <= 0) {
                    task()
                    // Timer has finished
                    state = "off"
                    cancel()
                } else {
                    getOnlinePlayers().forEach { player ->
                        player.sendMessage(Component.text("Starting in ${seconds}s", TextColor.color(155, 255, 255)))
                    }

                    // Decrement the timer
                    seconds--
                }
            }
        }.runTaskTimer(Bukkit.getPluginManager().getPlugin("GP_Printer2")!!, 0, 20)
    }
}

Timer.kt

@file:Suppress("KDocMissingDocumentation", "ReplaceNotNullAssertionWithElvisReturn")

package intelliractive.printer2

import org.bukkit.Bukkit
import org.bukkit.scheduler.BukkitRunnable
open class Timer(open var seconds: Int, open var tick: () -> Unit = {}, open var task: () -> Unit = {}) {
    open var state: String = "on"
    open fun start() {
        object : BukkitRunnable() {
            override fun run() {
                if (seconds <= 0) {
                    task()
                    // Timer has finished
                    state = "off"
                    cancel()
                } else {
                    tick()
                    // Decrement the timer
                    seconds--
                }
            }
        }.runTaskTimer(Bukkit.getPluginManager().getPlugin("GP_Printer2")!!, 0, 20)
    }
}