Little spawn code help

I am working on a game that involves zombies and i want them to spawn here: x -1493 Y123.000 z-266.40076, in my other theared they helped with the clock

Code:java

public class P2 extends JavaPlugin implements Runnable
{
    public void onEnable()
    {
        Bukkit.getScheduler().runTaskTimer(this, this, 100L, 100L);
    }
 
 
    public void run()
    {
 
 
 
 
            World world = Bukkit.getWorld("cw");
            Location spawnLoc = new Location(world, 1493, 123, 266);
            world.spawnCreature(spawnLoc, Zombie.class);
 
 
    }
}

But i want to add that every 5 min 10 zombies will spawn there but only if there are less then 3 zombies left in a redius of 10.
can u please help me?

 

bump

 

Loop through all living entitys and check the location and if they in the specific location

(or when u get a entity u can check nearbyEntitys)

Some links i got with fast googeling

Checks entitys nearby a area:
https://forums.bukkit.org/threads/get-nearby-entities-and-damage-them.137601/

Someother things:
https://forums.bukkit.org/threads/getnearbyentities-of-a-location.101499/