bbox[0]
      var bbox_polygon = L.polygon([
        [bbox[1], bbox[0]],
        [bbox[1], bbox[2]],
        [bbox[3], bbox[2]],
        [bbox[3], bbox[0]]
      ]);

      var map = L.map('map').setView([0, 0], 1);
      map.addLayer(new L.TileLayer(
        'https://tile.openstreetmap.org/{z}/{x}/{y}.png', {
          maxZoom: 18,
          attribution: 'Map data &copy; <a href="https://openstreetmap.org/copyright">OpenStreetMap contributors</a>'
        }
      ));

      map.addLayer(bbox_polygon);
    