JSFiddle - React, Tailwind, and code Playground

CSS

body {
	  margin: 0;
}
canvas {
	display: block;
}

JavaScript

var camera, scene, renderer;
var geometry, material, mesh;

import * as THREE from 'https://cdn.jsdelivr.net/npm/[email protected]/build/three.module.js';
import { OrbitControls } from 'https://cdn.jsdelivr.net/npm/[email protected]/examples/jsm/controls/OrbitControls.js';

init();
animate();

function init() {

    camera = new THREE.PerspectiveCamera( 70, window.innerWidth / window.innerHeight, 0.01, 10 );
    camera.position.z = 2;

    scene = new THREE.Scene();

    geometry = new THREE.BoxBufferGeometry();
		
    var materials = [
			new THREE.MeshBasicMaterial( { color: 0x0000ff } ),
			new THREE.MeshBasicMaterial( { color: 0xffff00 } ),
			new THREE.MeshBasicMaterial( { color: 0xffffff } ),
			new THREE.MeshBasicMaterial( { color: 0x00ff00 } ),
			new THREE.MeshBasicMaterial( { color: 0xff0000, transparent: true, opacity: 0.5 } ),
			new THREE.MeshBasicMaterial( { color: 0x00ffff } ),
			new THREE.MeshBasicMaterial( { color: 0xff00ff } ),
		];
    
    materials.forEach(m => m.side = THREE.DoubleSide )

    mesh = new THREE.Mesh( geometry, materials );
    scene.add( mesh );
    
    
    
    
    
    
    
    
    // CHANGING VERTICES
    
    let p = geometry.getAttribute('position')
    
    for(let i = 0; i < p.array.length; i+=3) {
    
    	console.log(p.array[i], p.array[i+1], p.array[i+2])
      
      if(i == 7 * 3) {

        p.array[i] -= .1
        p.array[i+1] -= .1
        p.array[i+2] -= .1
      }
      
    }
    
    p.needsUpdate = true
    
    geometry.computeBoundingSphere()
    
    
    
    
    
    
    
    
    

    renderer = new THREE.WebGLRenderer( { antialias: true } );
    renderer.setSize( window.innerWidth, window.innerHeight );
    document.body.appendChild( renderer.domElement );
		
		var controls = new OrbitControls( camera, renderer.domElement );

}

function animate() {

    requestAnimationFrame( animate );
    renderer.render( scene, camera );

}