[SCRIPT] 8 levers in order to unlock door

[The chaser]

SetEntityConnectionStateChangeCallback("lever_1", "Func_add");

SetEntityConnectionStateChangeCallback("lever_2", "Func_add");

SetEntityConnectionStateChangeCallback("lever_3", "Func_add");

SetEntityConnectionStateChangeCallback("lever_4", "Func_add");

SetEntityConnectionStateChangeCallback("lever_5", "Func_add");

SetEntityConnectionStateChangeCallback("lever_6", "Func_add");

SetEntityConnectionStateChangeCallback("lever_7", "Func_add");

SetEntityConnectionStateChangeCallback("lever_8", "Func_add");

void Func_add (string &in asEntity, int alState);
if (alState)=1
{
AddLocalVarInt("var_1", 1);
GET();
}

void GET (?)
if (GetLocalVarInt(("var_1")=8)
{
////Stuff you want to happen
}

It should be something like this.