Script that prevents players to enter an area until x mobs are killed

[TemplarOfTheMist]

Hello!

I'd like to request a script, or just a draft on how to make an area with barricades to prevent entering the next area until 3 monsters (let's say 1 Poring, 1 Drops and 1 Poporing) are killed in the same map. I'd like to know which function should be used and how nested are they.

The idea in my head would be

-1 Script Name {
If map have mobID present or mobID present or mobID present{
summon barricades to prevent players from accessing the warp portal
}
else {
remove barricades
}

I believe this won't have any bugs? or will this script only check once? I need to make my script running all the time in the map.

And I need to set it to run only for an hour (so I guess OnHourxx)?

If someone can make this idea into a real code that would be great

 

Thanks in advance

Edited September 5, 2017 by Mickosis
Added idea draft

[Z3R0]

*setcell "<map name>",<x1>,<y1>,<x2>,<y2>,<type>,<flag>;

Example:

setcell "schg_cas05",114,51,125,51,cell_walkable,0;

use 1 or 0 to remove cell_walkable 0 is cannot walk, 1 is can