USkyWars API

import teamgx.kubig.skywars.api.GameEndEvent;
import teamgx.kubig.skywars.game.Game;
import teamgx.kubig.skywars.manager.GameManager;

import org.bukkit.inventory.meta.FireworkMeta;
import org.bukkit.entity.Firework;
import org.bukkit.Color;
import org.bukkit.FireworkEffect;
import org.bukkit.entity.Firework;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;

public class GameWinEffect
implements Listener {

     @EventHandler
    public void onGameEnd(GameEndEvent e) {
     Player p = (Player)e.getWinner();
     Game game = GameManager.get().getP(p);
     if (game == null) {
      return;
     }
     launch_fireworks(p);
     e.setCancelled(true);
    }

    public void launch_fireworks(Player p) {
     Firework fireworks = (Firework)p.getWorld().spawn(p.getLocation().clone().add(0.5D, 0.5D, 0.5D), Firework.class);
     FireworkMeta fireworksmeta = fireworks.getFireworkMeta();
     
     FireworkEffect fireworkseffect = FireworkEffect.builder().with(FireworkEffect.Type.BALL).withColor(Color.YELLOW).withFade(Color.AQUA).flicker(true).trail(true).build();
     fireworksmeta.setPower(1);
     fireworksmeta.addEffect(fireworkseffect);
     fireworks.setFireworkMeta(fireworksmeta);
    }
}