[SCRIPT] How do add poff effects to remove monster area?

[SilentHideButFine]

As the title said , i want to add poff effect to my monster remove script

void OnStart()
{
SetEntityCallbackFunc("keynotwork", "PickUpKeyFunc");
AddEntityCollideCallback("servant_grunt_1", "ScriptArea_1", "remove", true, 1);
}

void remove(string &in asParent, string &in asChild, int alState)
{
SetEntityActive("servant_grunt_1", false);
}


void PickUpKeyFunc(string &in entity, string &in type)
{
if(type == "OnPickup")
{
SetEntityActive("servant_grunt_1", true);
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_1", 2, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_2", 2, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_3", 2, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_4", 2, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_5", 2, "");
AddEnemyPatrolNode("servant_grunt_1", "PathNodeArea_6", 2, "");
StartPlayerLookAt("castle_2", 5, 5, "");
PlaySoundAtEntity("", "react_scare.snt", "mansion_2", 0, false);
GiveSanityDamage(40, true);
AddTimer("StopLookAt", 3, "StopLookAtEvent");
}
}

void StopLookAtEvent(string &in asTimer)
{
StopPlayerLookAt();
}