public ZombieLevel(House current) {
        this.house = current;
        int width = current.getHouseWidth();
        int length = current.getHouseLength();
        Tile[][] array = current.getHouseLayout();
        // On instantiation, layout is set to a copy of the original array.
        layout = new Tile[width][length];
        original = new Tile[width][length];
        for (int x = 0; x < length; x++) {
            for (int y = 0; y < width; y++) {
                original[x][y] = array[x][y].cloneTile();
                layout[x][y] = original[x][y].cloneTile();
            }
        }
    }