Mob count

[Cardinale]

Good morning, I would like to know how I make a npc that counts the show number on the map.
EX: This map has 10 porings.

would you create a command similar to mobcount in script.c?

ex: mobcount (map, id_mob);

my script ,

during the loop he summons another monster. I would like a condition, if you already have mob 2606 do nothing

OnNPCKillEvent:
 
    set .Kill_mob_id,1015;
	
    if(killedrid == .Kill_mob_id && strcharinfo(3)=="pay_dun00"){
	   
	    count++;
		
		if(count == 5){
		
		count = 0;
		monster "pay_dun00",0,0,"Furious Zombie",2606,1;
		announce "[Mob Furious]: O monstro Furious Zombie esta no mapa.",8;
		end;
		
		
	    }

    }