JSFiddle - React, Tailwind, and code Playground

HTML

<script src="https://threejs.org/build/three.js"></script>
<script src="https://threejs.org/examples/js/controls/OrbitControls.js"></script>

CSS

body {
	background-color: #000;
	margin: 0px;
	overflow: hidden;
}

JavaScript

// Simple three.js example

var mesh, renderer, scene, camera, controls;

init();
animate();

function init() {

    // renderer
    renderer = new THREE.WebGLRenderer();
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );

    // scene
    scene = new THREE.Scene();
    
    // camera
    camera = new THREE.PerspectiveCamera( 40, window.innerWidth / window.innerHeight, 1, 10000 );
    camera.position.set( 20, 20, 20 );

    // controls
    controls = new THREE.OrbitControls( camera );
    
    // ambient
    scene.add( new THREE.AmbientLight( 0x222222 ) );
    
    // light
    var light = new THREE.DirectionalLight( 0xffffff, 1 );
    light.position.set( 20, 20, 0 );
    scene.add( light );
    
    // axes
    scene.add( new THREE.AxesHelper( 20 ) );

    // geometry
    var geometry = new THREE.SphereGeometry( 5, 12, 8 );
    
    // material
    var material = new THREE.MeshPhongMaterial( {
        color: 0x00ffff, 
        flatShading: true,
        transparent: true,
        opacity: 0.7,
    } );
    
    // mesh
    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );
    
    
    
    ///////// EXAMPLE STARTS HERE
    // Points are white but should be random colors.
    
    var geometry2 = new THREE.SphereGeometry( 5, 12, 8 );
    
    var vertexMaterial = new THREE.PointsMaterial( {
        size: 1,
        vertexColors: THREE.VertexColors,
        transparent: true,
    		opacity: 1
    } );
    
    var vertexColors = [];
    // Replace mesh.geometry with geometry2 to see random colors.
    for( let i = 0; i < mesh.geometry.vertices.length; i++ ) {
        // random color
        vertexColors[i] =
        new THREE.Color(Math.random(), Math.random(), Math.random());
    }
    geometry2.colors = vertexColors;
    // Replace mesh.geometry with geometry2 to see random colors.
    var vertexPoints = new THREE.Points(mesh.geometry, vertexMaterial);
   ...