Erstellung eines "Dead man switch" mit Google Apps Script

function sendEmailWithDriveAccess() {
  var unreadSubject = "Periodic activity check - Last reminder: PLEASE REACT"; // Replace with the subject line of the unread email
  var emailSubject = "Zugang zu meinem Online-Inventar"; // Replace with the subject line of the email you want to send
  var folderId = "DEINE-GOOGLE-DRIVE-ORDNER-ID"; // Replace with the ID of the Google Drive folder you want to share with the recipients
  var folder = DriveApp.getFolderById(folderId); // Get the Google Drive folder by ID
    var emailBody = "Hallo<br><b>Wenn du diese Nachricht bekommst, bin ich selber derzeit verhindert.</b> Du erhälst bald eine E-Mail mit Zugriff zu meiner Online-Verwaltung in Google Drive. Dort findest du auch ein Dokument mit weiteren Erläuterugen und Anleitungen. Hier ist der direkte Link: <a href='" + folderUrl + "'>Google Drive Ordner öffnen</a>.";// Replace with the HTML body of the email you want to send
  var senderName = "DEIN-NAME über keeyper.com"; // Replace with the name you want to use as the sender
  var recipients = "EMPFÄNGER"; // Replace with the email addresses of the recipients, separated by commas

  var delayDays = 2; // Change this to the number of days you want to wait before sending the email
  var delay = delayDays * 24 * 60 * 60 * 1000; // Calculate delay time in milliseconds
  var currentTime = new Date().getTime();
  var threads = GmailApp.search("is:unread subject:" + unreadSubject); // Search for emails with the specified subject that haven't been read yet

  // Check if there are any unread emails with the specified subject that haven't been read for the specified number of days
  for (var i = 0; i < threads.length; i++) {
    var thread = threads[i];
    var lastMessage = thread.getMessages()[0];
    var messageTime = lastMessage.getDate().getTime();

    if (currentTime - messageTime >= delay) {
      // Send the email with the specified subject and body to the recipients
      GmailApp.sendEmail(recipients, emailSubject, "", {
        htmlBody: emailBody,
        name: senderName
      });

      // Get the Google Drive folder by ID
      var folder = DriveApp.getFolderById(folderId);

      // Share the folder with the recipients
      folder.addEditor(recipients);

      // Mark the entire thread as "read"
      thread.markRead();

      // Exit the loop if an unread email is found
      break;
    }
  }
}