     return;
    }
    var xprediction = data.x; //these x coordinates are relative to the viewport 
    var yprediction = data.y; //these y coordinates are relative to the viewport
    console.log(elapsedTime); //elapsed time is based on time since begin was called
}).begin();
                    </code></pre>
                    <p> Here is the alternate method of getting predictions where you can request a gaze prediction as needed. </p>
                    <pre><code class="javascript hljs">
var predict