text: const map = new CartoMap({
      container: 'map',
      background: 'black'
  });
  
  const source = new carto.source.GeoJSON(sources['points']);
  const viz = new carto.Viz('color: ramp($cat, [hsv(0,1,1), hsv(0,0,1)]), width: 50');
  const layer = new carto.Layer('layer', source, viz);
  
  layer.addTo(map);
  layer.on('loaded', () => {
      window.loaded = true;
  });
  