e content areas size
            renderer.setSize(canvasWidth, canvasHeight);

            // Get the DIV element from the HTML document by its ID and append the renderers DOM
            // object to it
            document.getElementById("WebGLCanvas").appendChild(renderer.domElement);

            // Create the scene, in which all objects are stored (e. g. camera, lights,
            // geometries, ...)
            scene = new THREE.Scene();

            // Now that we have a scene, we want to