   progressbarElem.style.width = `${itemsLoaded / itemsTotal * 100 | 0}%`;
  };

  const models = {
    pig:    { url: 'resources/models/animals/Pig.gltf' },
    cow:    { url: 'resources/models/animals/Cow.gltf' },
    llama:  { url: 'resources/models/animals/Llama.gltf' },
    pug:    { url: 'resources/models/animals/Pug.gltf' },
    sheep:  { url: 'resources/models/animals/Sheep.gltf' },
    zebra:  { url: 'resources/models/animals/Zebra.gltf' },
    horse:  { url: 'resources/models/animals/Horse.gltf' }