code start

public class StartCommand implements CommandExecutor {

      private Main instance;
      public StartCommand(Main instance) {
        this.instance = instance;
      }

      public Integer counttime = ScoreboardAPI.counttime;
      public Integer gametime = ScoreboardAPI.gametime;
      ScoreboardAPI sc = new ScoreboardAPI();

    public boolean onCommand(CommandSender send, Command cmd, String label, String[] args) {
        if (cmd.getName().equalsIgnoreCase("start")) {
            new BukkitRunnable() {
                public void run() {
                    for (Player p : Bukkit.getOnlinePlayers()) {
                        if (counttime <= 0) {
                            counttime+=10;
                            p.sendTitle("ゲームスタート", "~~Mob_Attacker~~", 10, 10, 10);
                            sc.mob.setDisplaySlot(DisplaySlot.SIDEBAR);
                            this.cancel();
                        }
                        else {
                            p.sendMessage("ゲーム開始まで " + String.valueOf(counttime) + "秒");
                            p.playSound(p.getLocation(), Sound.UI_BUTTON_CLICK, 50, 50);
                            counttime--;
                        }
                    }
                    gametime--;
                }
            }.runTaskTimer(instance, 0L, 20L);
            new BukkitRunnable() {
                public void run() {
                    for (Player p : Bukkit.getOnlinePlayers()) {
                        if (gametime == 0) {
                            gametime+=910;
                            sc.mob.setDisplayName("Mob_Attacker");
                            p.sendTitle("ゲーム終了", "~~Mob_Attacker~~", 10, 10, 10);
                            this.cancel();
                        }
                        else {
                            sc.board.resetScores(String.valueOf((gametime%3600) / 60) + ":" + String.valueOf(gametime % 60));
                            sc.mob.getScore(String.valueOf((gametime%3600) / 60) + ":" + String.valueOf(gametime % 60)).setScore(22);
                            gametime--;
                        }
                    }
                }
            }.runTaskTimer(instance, 0L, 20L);
        }
        return false;
    }
}