scr_include

///scr_include(key_ring, key1, key2, ...)
/*
    You can use this script to add multiple controllers to a single room, or multiple
    rooms can have a single controller. The key_ring value determines which.

    Must be put in the room start event!
*/

var keys, key_ring, i;

key_ring = argument[0];
keys[0] = argument[1];

//Sort all listed keys into array, as well as allows for optional arguments.
    if argument_count > 2{
        for(i=1;i<argument_count;i++){
            keys[i-1] = argument[i];
        }
    }

//Check if key_ring is a room or an object, and act accordingly.
    if room_exists( key_ring ){
        if room = key_ring{
            for(i=0;i<array_length_1d(keys);i++){
                if !instance_exists(keys[i]){
                    instance_create(0,0, keys[i]);
                }
            }
        }
    }else{
        for(i=0;i<array_length_1d(keys);i++){
            if room = keys[i] and !instance_exists(key_ring){
                instance_create(0,0,key_ring)
            }
        }
    }