private static void create2Rooms() throws Exception {
    AccessibilityGraphImpl room1 =
        GraphFactory.createRectangularGridGraph(300, 300, 3, 3, 10, 10.0);
    AccessibilityGraphImpl room2 =
        GraphFactory.createRectangularGridGraph(300, 300, 3, 3, 10, 400.0);

    room1.copyFrom(room2);
    Location vertex1 = room1.getNearestLocation(new Point2D.Float(160, 310));
    Location vertex2 = room1.getNearestLocation(new Point2D.Float(160, 450));

    System.out.println(vertex1);
    System.out.println(vertex2);

    room1.addAccessibilityRelation(vertex1, vertex2);

    new GraphGUI(room1);

    room1.write("src/main/resources/graphs/2rooms.txt");

    room1.writeGrid("src/main/resources/grids/2rooms.txt");
  }