tent = '✖ Error: File could not be found';
                            return;
                        }

                        if (xhr.status >= 400) {
                            code.textContent = '✖ Error ' + xhr.status + ' while fetching file: ' + xhr.statusText;
                            return;
                        }

                        code.textContent = '✖ Error: An unknown error occurred';
                    };

                    xhr.send(null);
                });
           