Update pointCloud.js

    .then(responseText => {

      let pointCloudData = parseJSONToPointCloud(responseText, object);

      // Remove existing canvas element if any

      let existingCanvas = document.querySelector('canvas');

      if (existingCanvas) {

        existingCanvas.parentNode.removeChild(existingCanvas);

      }

      // Use three.js to render the point cloud

      let scene = new THREE.Scene();

      let camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 0.1, 1000);