three.js dev template - module

HTML

<!-- Import maps polyfill -->
<!-- Remove this when import maps will be widely supported -->
<script async src="https://unpkg.com/[email protected]/dist/es-module-shims.js"></script>
    
<script type="importmap">
	{
		"imports": {
			"three": "https://unpkg.com/three/build/three.module.js",
      "three/addons/": "https://unpkg.com/three/examples/jsm/"
		}
	}
</script>

CSS

body {
	margin: 0px;
}

JavaScript

// Simple three.js example

import * as THREE from 'three';
import { OrbitControls } from 'three/addons/controls/OrbitControls.js';

let mesh, renderer, scene, camera, controls;

init();
animate();

function init() {

    // renderer
    renderer = new THREE.WebGLRenderer();
    renderer.setSize( window.innerWidth, window.innerHeight );
    renderer.setPixelRatio( window.devicePixelRatio );
    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 OrbitControls( camera, renderer.domElement );
    
    // ambient
    scene.add( new THREE.AmbientLight( 0x222222 ) );
    
    // light
    const light = new THREE.DirectionalLight( 0xffffff, 1 );
    light.position.set( 20,20, 0 );
    scene.add( light );
    
    // axes
    scene.add( new THREE.AxesHelper( 20 ) );

    // geometry
    const geometry = new THREE.SphereGeometry( 5, 12, 8 );
    
    // material
    const material = new THREE.MeshPhongMaterial( {
        color: 0x00ffff, 
        flatShading: true,
        transparent: true,
        opacity: 0.7,
    } );
    //box
				var boxGeometry = new THREE.BoxGeometry(10, 10, 10);
				var boxMaterial = new THREE.MeshLambertMaterial({ color: 0xff0000 });

				var box = new THREE.Mesh(boxGeometry, boxMaterial);
				box.position.set(0,5,0);
				scene.add(box)

				var floorGeometry = new THREE.BoxGeometry(20, 0.1, 20);
				var floorMaterial = new THREE.MeshBasicMaterial({ color: 0xffffff });
				var floorMesh = new THREE.Mesh(floorGeometry, floorMaterial);
				var colinbox = 0x00fc2a; 
            colinbox = 0xe60800;

            var InGeometry = new THREE.BoxGeometry( 19, 0.2,  19); 
            var InEdges = new THREE.EdgesGeometry(InGeometry);
            var lineInBox = new THREE.LineSegments(InEdges, new THREE.LineBasicMaterial({...