Firework on Spawn

I want to create a blue firework that appears when the player joins the server.
What would the code be for this? Ive been working on it and nothing seems to work:/
I want it to spawn where they are standing.

Thanks

 

What have you tried so far?

 

Can't even create the firework to be honest. Sorry I'm not very good yet:/

 

Post your code, I have just started coding bukkit plugins and i made the exact same type of plugin.

 

p.getWorld().spawnEntity(p.getLocation(), EntityType.FIREWORK);

 

p.getWorld().spawnEntity(p.getLocation(), EntityType.FIREWORK);

 

That code works, but how would I make it RED or GREEN?

 

Firework f = p.getWorld().spawnEntity(p.getLocation(), EntityType.FIREWORK);
f.getGetFireworkMeta() = FireworkEffect.builder().withColor(Color.GREEN);