waiter = 0
timer = -1
npc_id = room_get_name(room) + object_get_name(object_index)
if is_undefined(ds_map_find_value(global.npc_map, npc_id))
    ds_map_add(global.npc_map, npc_id, 0)
npc_flag = ds_map_find_value(global.npc_map, npc_id)