Three.js starter kit

(function(){
  'use strict';
  
  var tau = Math.PI * 2;
  var width, height;
  var scene, camera, renderer, pointCloud;
  
  function onDocumentReady(){
    initialize();
    
    //CODE
    
    renderer.render(scene, camera);
  }
  
  function initialize(){
    scene = new THREE.Scene();
    camera = new THREE.PerspectiveCamera(120, 16 / 9, 1, 1000);
    renderer = new THREE.WebGLRenderer();
    document.body.appendChild(renderer.domElement);
    window.addEventListener('resize', onWindowResize);
    onWindowResize();
  } 
  
  function onWindowResize(){
    width = window.innerWidth;
    height = window.innerHeight;
    updateRendererSize();
  }
  
  function updateRendererSize(){
    renderer.setSize(width, height);
    camera.aspect = width / height;
    camera.updateProjectionMatrix();
  }
  
  document.addEventListener('DOMContentLoaded', onDocumentReady);
})();