old_contents: "use strict";
  
  const TweenMax = require('gsap');
  const glslify = require('glslify');
  const THREE = require('three');
  const Stats = require('stats.js');
  
  var camera, scene, renderer, mouse, stats, geometry, shaderMaterial, mesh, clock;
  var isLoop;
  
  function init() {
      camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 10000);
      camera.position.z = 1000;
  
      scene = new THREE.Scene();
      geometry = new THREE.BoxGeometry(200, 200, 200);
      shaderMaterial = new THREE.ShaderMaterial({
          vertexShader: glslify('./shaders/shader.vert'),
          fragmentShader: glslify('./shaders/shader.frag')
      });
  
      mesh = new THREE.Mesh(geometry, shaderMaterial);
      scene.add(mesh);
  
      renderer = new THREE.WebGLRenderer();
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.setClearColor(0x000000);
  
      stats = new Stats();
      clock = new THREE.Clock();
      document.body.appendChild( stats.dom );
  
      document.body.appendChild(renderer.domElement);
      document.addEventListener('mousemove', onDocumentMouseMove, false);
  }
  
  function loop() {
      var delta = clock.getDelta();
      console.log(delta);
  
      mesh.rotation.x += 0.01;
      mesh.rotation.y += 0.02;
  
  
      renderer.render(scene, camera);
      stats.update()
  }
  
  require('domready')(() => {
      init();
      isLoop = true;
      TweenMax.ticker.addEventListener("tick", loop);
  });
  
  function onDocumentMouseMove(event){
      event.preventDefault();
      if(!mouse) mouse = new THREE.Vector2();
  
      mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
      mouse.y = -( event.clientY / window.innerHeight ) * 2 + 1;
  }
  
  window.addEventListener("resize", function(ev){
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
  
      renderer.setSize(window.innerWidth, window.innerHeight);
  });
  
  window.addEventListener('keydown', function(ev){
      switch(ev.which){
          case 27:
              isLoop = !isLoop;
              if(isLoop) {
                  clock.stop();
                  TweenMax.ticker.addEventListener("tick", loop);
              }else{
                  clock.start();
                  TweenMax.ticker.removeEventListener("tick", loop);
              }
              break;
      }
  });
new_contents: "use strict";
  
  const TweenMax = require('gsap');
  const glslify = require('glslify');
  const THREE = require('three');
  const Stats = require('stats.js');
  
  var camera, scene, renderer, mouse, stats, geometry, shaderMaterial, mesh, clock;
  var isLoop;
  
  function init() {
      camera = new THREE.PerspectiveCamera(75, window.innerWidth / window.innerHeight, 1, 10000);
      camera.position.z = 1000;
  
      scene = new THREE.Scene();
      geometry = new THREE.BoxGeometry(200, 200, 200);
      shaderMaterial = new THREE.ShaderMaterial({
          vertexShader: glslify('./shaders/shader.vert'),
          fragmentShader: glslify('./shaders/shader.frag')
      });
  
      mesh = new THREE.Mesh(geometry, shaderMaterial);
      scene.add(mesh);
  
      renderer = new THREE.WebGLRenderer();
      renderer.setSize(window.innerWidth, window.innerHeight);
      renderer.setClearColor(0x000000);
  
      stats = new Stats();
      clock = new THREE.Clock();
      document.body.appendChild( stats.dom );
  
      document.body.appendChild(renderer.domElement);
      document.addEventListener('mousemove', onDocumentMouseMove, false);
  }
  
  function loop() {
      var delta = clock.getDelta();
  
      mesh.rotation.x += 0.01;
      mesh.rotation.y += 0.02;
  
  
      renderer.render(scene, camera);
      stats.update()
  }
  
  require('domready')(() => {
      init();
      isLoop = true;
      TweenMax.ticker.addEventListener("tick", loop);
  });
  
  function onDocumentMouseMove(event){
      event.preventDefault();
      if(!mouse) mouse = new THREE.Vector2();
  
      mouse.x = ( event.clientX / window.innerWidth ) * 2 - 1;
      mouse.y = -( event.clientY / window.innerHeight ) * 2 + 1;
  }
  
  window.addEventListener("resize", function(ev){
      camera.aspect = window.innerWidth / window.innerHeight;
      camera.updateProjectionMatrix();
  
      renderer.setSize(window.innerWidth, window.innerHeight);
  });
  
  window.addEventListener('keydown', function(ev){
      switch(ev.which){
          case 27:
              isLoop = !isLoop;
              if(isLoop) {
                  clock.stop();
                  TweenMax.ticker.addEventListener("tick", loop);
              }else{
                  clock.start();
                  TweenMax.ticker.removeEventListener("tick", loop);
              }
              break;
      }
  });
subject: remove console.log.