ground = new THREE.Color('white');

  function addLight(...pos) {
    const color = 0xFFFFFF;
    const intensity = 1;
    const light = new THREE.DirectionalLight(color, intensity);
    light.position.set(...pos);
    scene.add(light);
    scene.add(light.target);
  }
  addLight(5, 5, 2);
  addLight(-5, 5, 5);

  const manager = new THREE.LoadingManager();
  manager.onLoad = init;

  const progressbarElem = document.querySelector('#progressbar');
  manager.onProgress = (url, itemsLoaded, itemsTotal) => {
 