public Entity connect(String activate){
		Entity active = null;
		if (crates.containsKey(activate)){
			active=crates.get(activate);
		}
		if (walls.containsKey(activate)){
			active=walls.get(activate);
		}
		if (entities.containsKey(activate)){
			active=entities.get(activate);
		}
		if (background.containsKey(activate)){
			active=background.get(activate);
		}
		return active;
	}