text: // Copyright 2020 Google LLC
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  //     https://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  /**
   * Adds a random image to the page.
   */
  function randomizeImage() {
    // The images directory contains 11 images, so generate a random index between
    // 1 and 11.
    const imageIndex = Math.floor(Math.random() * 11) + 1;
    const imgUrl = 'images/image-' + imageIndex + '.jpg';
  
    const imgElement = document.createElement('img');
    imgElement.src = imgUrl;
  
    const imageContainer = document.getElementById('random-image-container');
    // Remove the previous image.
    imageContainer.innerHTML = '';
    imageContainer.appendChild(imgElement);
  }
  
  
  