BNG_Pong_Renderer

// set the scene size
var WIDTH = 640,
HEIGHT = 360;

// create a WebGL renderer, camera
// and a scene
var renderer = new THREE.WebGLRenderer();

// start the renderer
renderer.setSize(WIDTH, HEIGHT);

// attach the render-supplied DOM element (the gameCanvas)
var c = document.getElementById("gameCanvas");
c.appendChild(renderer.domElement);

...

function draw()
{  
    // draw THREE.JS scene
    renderer.render(scene, camera);

    // loop the draw() function
    requestAnimationFrame(draw);

    // process game logic
    ...
}