Code

package me.scottyrobotixgaming.fireworkwand;

import java.util.ArrayList;

import org.bukkit.Bukkit;
import org.bukkit.ChatColor;
import org.bukkit.Color;
import org.bukkit.FireworkEffect;
import org.bukkit.FireworkEffect.Type;
import org.bukkit.Material;
import org.bukkit.entity.Firework;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.block.Action;
import org.bukkit.event.player.PlayerInteractEvent;
import org.bukkit.event.player.PlayerJoinEvent;
import org.bukkit.event.player.PlayerQuitEvent;
import org.bukkit.inventory.ItemStack;
import org.bukkit.inventory.meta.FireworkMeta;
import org.bukkit.inventory.meta.ItemMeta;
import org.bukkit.plugin.java.JavaPlugin;

public class FireWorkWand extends JavaPlugin implements Listener {
	public void onEnable(){
		Bukkit.getServer().getPluginManager().registerEvents(this, this);
	}
	@EventHandler
	public void onPlayerJoin(PlayerJoinEvent e){
		Player p = e.getPlayer();
		ItemStack blaze = new ItemStack(Material.BLAZE_ROD, 1);
		ItemMeta meta = (ItemMeta) blaze.getItemMeta();
		meta.setDisplayName(ChatColor.DARK_RED + "Firework Wand");
		//Name of blaze rod ^
		blaze.setItemMeta(meta);
		p.getInventory().addItem(blaze);
	}
	@EventHandler
	public void onPlayerQuit(PlayerQuitEvent e){
		Player p = e.getPlayer();
		ItemStack blaze = new ItemStack(Material.BLAZE_ROD);
		ItemMeta meta = (ItemMeta) blaze.getItemMeta();
		meta.setDisplayName(ChatColor.DARK_RED + "Firework Wand");
		//If you change the name of the blaze rod under PlayerJoinEvent then make it the exact same here.
		blaze.setItemMeta(meta);
		if (!(p.getInventory().contains(blaze))) return;
		if (!(blaze.getItemMeta().equals(meta))) return;
		   p.getInventory().remove(blaze);
	}

	ArrayList<Player> cooldown = new ArrayList<Player>();

	@EventHandler
	public void onPlayerInteract(PlayerInteractEvent e){
		final Player p = e.getPlayer();
		if (!(e.getAction() == Action.RIGHT_CLICK_AIR || e.getAction() == Action.RIGHT_CLICK_BLOCK)) return;
		if (e.getItem() == null) return;
		if (!(e.getItem().getType() == Material.BLAZE_ROD)) return;
        if (cooldown.contains(p)){
            p.sendMessage(ChatColor.RED + "Firework Wand is cooling down!");
            //Things for cooldown, message is changeable^
            return;
          }
        //Custom fireworks below, to add more make sure the shortened versions are different E.G. 1. Firework f = _____ 2. Firework fw = ___
        //Make sure you change everywhere it is used as well.
		Firework f = (Firework) e.getPlayer().getWorld().spawn(e.getPlayer().getLocation(), Firework.class);
		FireworkMeta fm = f.getFireworkMeta();
		fm.addEffect(FireworkEffect.builder()
                .flicker(false)
                .trail(true)
                .with(Type.BALL_LARGE)
                .withColor(Color.BLUE)
                .withFade(Color.ORANGE)
                .build());
        fm.setPower(1);
        f.setFireworkMeta(fm);
		Firework fw = (Firework) e.getPlayer().getWorld().spawn(e.getPlayer().getLocation(), Firework.class);
		FireworkMeta fmm = fw.getFireworkMeta();
		fmm.addEffect(FireworkEffect.builder()
                .flicker(true)
                .trail(false)
                .with(Type.BALL_LARGE)
                .withColor(Color.ORANGE)
                .withFade(Color.AQUA)
                .build());
        fmm.setPower(2);
        fw.setFireworkMeta(fmm);
        Firework fww = (Firework) e.getPlayer().getWorld().spawn(e.getPlayer().getLocation(), Firework.class);
		FireworkMeta fmmm = fww.getFireworkMeta();
		fmmm.addEffect(FireworkEffect.builder()
                .flicker(true)
                .trail(false)
                .with(Type.STAR)
                .withColor(Color.RED)
                .withFade(Color.BLUE)
                .build());
        fmmm.setPower(2);
        fww.setFireworkMeta(fmmm);
        Firework fwww = (Firework) e.getPlayer().getWorld().spawn(e.getPlayer().getLocation(), Firework.class);
		FireworkMeta fmmmm = fwww.getFireworkMeta();
		fmmmm.addEffect(FireworkEffect.builder()
                .flicker(true)
                .trail(false)
                .with(Type.CREEPER)
                .withColor(Color.YELLOW)
                .withFade(Color.WHITE)
                .build());
        fmmmm.setPower(3);
        fwww.setFireworkMeta(fmmmm);
        Firework fwwww = (Firework) e.getPlayer().getWorld().spawn(e.getPlayer().getLocation(), Firework.class);
		FireworkMeta fmmmmm = fwwww.getFireworkMeta();
		fmmmmm.addEffect(FireworkEffect.builder()
                .flicker(false)
                .trail(true)
                .with(Type.BURST)
                .withColor(Color.PURPLE)
                .withFade(Color.NAVY)
                .build());
		//Effects of firework, don't remove .build());
        fmmmmm.setPower(2);
        //How high the firework goes.
        fwwww.setFireworkMeta(fmmmmm);
        cooldown.add(p);
        Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
            public void run() {
                    cooldown.remove(p);

            }
    }, 600);
        //Cooldown time in ticks. 20 ticks=1 second. 600 ticks=30 seconds
}
}