This plugin launches a Red Firework wherever any player dies. (I made this to make it easier to tell when you had killed somebody in the Survival Games.)

**EDIT**

I probably won't bother with changing anything else on this plugin. It as of now fulfills the goal I originally designed it to do. I welcome any Bukkit coders to have at it if they think they can improve this plugin. You are free to use the source code of this plugin in anything you want to without needing to credit me in any way. I hope this can help somebody out!

Plugin Source Code: (This was coded for 1.7.2, so it may need a bit of updating for newer versions of Bukkit.)
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import org.bukkit.Bukkit;
import org.bukkit.Color;
import org.bukkit.FireworkEffect;
import org.bukkit.FireworkEffect.Type;
import org.bukkit.entity.Firework;
import org.bukkit.entity.Player;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.PlayerDeathEvent;
import org.bukkit.inventory.meta.FireworkMeta;
import org.bukkit.plugin.java.JavaPlugin;

public class Main extends JavaPlugin implements Listener {

public void onEnable() {
Bukkit.getServer().getPluginManager().registerEvents(this, this);
getConfig().options().copyDefaults(true);
saveConfig();
}

@EventHandler
public void onEntityDeath(final PlayerDeathEvent e) {
if (e.getEntity() instanceof Player)
if(this.getConfig().getBoolean("Firework-air-launch")) {
Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
public void run() {
Firework f = (Firework) e.getEntity().getWorld().spawn(e.getEntity().getLocation(), Firework.class);

FireworkMeta fm = f.getFireworkMeta();
fm.addEffect(FireworkEffect.builder()
.flicker(true)
.trail(true)
.with(Type.BALL_LARGE)
.withColor(Color.RED)
.withFade(Color.RED)
.build());
fm.setPower(0);
f.setFireworkMeta(fm);
}
}, 20);}
else
Bukkit.getServer().getScheduler().scheduleSyncDelayedTask(this, new Runnable() {
public void run() {
Firework f = (Firework) e.getEntity().getWorld().spawn(e.getEntity().getLocation(), Firework.class);

FireworkMeta fm = f.getFireworkMeta();
fm.addEffect(FireworkEffect.builder()
.flicker(true)
.trail(true)
.with(Type.BALL_LARGE)
.withColor(Color.RED)
.withFade(Color.RED)
.build());
fm.setPower(0);
f.setFireworkMeta(fm);
f.detonate();
}
}, 20);
}
}
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**Config.yml contents**
version: 1.0
Firework-air-launch: true
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Death Firework