Using canvas as ThreeJS texture

<!DOCTYPE html>
<html>
<head>
  <meta charset="utf-8">
  <title>JS Bin</title>
</head>
<body style="background:#fff;">
<script src="https://cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.min.js"></script>
<canvas id="canvas"></canvas>
<script id="jsbin-javascript">
var width = window.innerWidth, height = window.innerHeight / 2;
var size = 256;
var canvas = document.getElementById('canvas'),
    ctx = canvas.getContext('2d');

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

function changeCanvas() {
    ctx.font = '20pt Arial';
    ctx.fillStyle = 'red';
    ctx.fillRect(0, 0, canvas.width, canvas.height);
    ctx.fillStyle = 'white';
    ctx.fillRect(10, 10, canvas.width - 20, canvas.height - 20);
    ctx.fillStyle = 'black';
    ctx.textAlign = "center";
    ctx.textBaseline = "middle";
    ctx.fillText(new Date().getTime(), canvas.width / 2, canvas.height / 2);
}

function init() {
    renderer = new THREE.WebGLRenderer();
    renderer.setSize(width, height);
    document.body.appendChild(renderer.domElement);
    
  scene = new THREE.Scene();
  
    camera = new THREE.PerspectiveCamera(70, width / height, 1, 1000);
    camera.position.z = 500;
    scene.add(camera);

texture = new THREE.Texture(canvas);
    var material = new THREE.MeshBasicMaterial({ map: texture });
    geometry = new THREE.BoxGeometry( 200, 200, 200 );
    mesh = new THREE.Mesh( geometry, material );
    scene.add( mesh );

canvas.width = canvas.height = size;
}

function animate() {
    requestAnimationFrame(animate);
  
    changeCanvas();
    texture.needsUpdate = true;
    mesh.rotation.y += 0.01;
    renderer.render(scene, camera);
}

init();
animate();
</script>
</body>
</html>

Modified http://cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.min.js to a secure url

https://cdnjs.cloudflare.com/ajax/libs/three.js/r68/three.min.js