|obj||The object to total the number of instances of.|
With this function you can find out how many active instances of
the specified object exists in the room. Please note that those
instances which have been deactivated with the instance_deactivate
functions will not be included in this check.
if instance_number(object_index) < 50
instance_create(random(room_width), random(room_height), object_index);
The above code will check the number of instances that are created form the same object as the current instance and then if there are less than 50, create another one at a random position within the room.