//Standalone script to create Form
function createForm() {
  const form = FormApp.create("Brochure request");
  form.setTitle('Brochure request');
  form.setCollectEmail(true);
}

//Stored in Google Form - i.e. bound to form
//Send brochure PDF when form filled out
function example101() {
  //Get email
  const form = FormApp.getActiveForm();
  const responses = form.getResponses();
  const latestResponse = responses[responses.length-1];
  const emailAddress = latestResponse.getRespondentEmail();

  //Get Slides and create PDF
  const brochure = DriveApp.getFileById('ADD FILE ID HERE')
                           .getAs(MimeType.PDF);

  //Send PDF in email
  MailApp.sendEmail(emailAddress,
                    'BROCHURE',
                    'Please find attached this year\'s brochure.',
                    {attachments: brochure,
                     name: 'Brochure 2019'})
}

function setUpTrigger() {
  var form = FormApp.getActiveForm();
  ScriptApp.newTrigger('example101')
  .forForm(form)
  .onFormSubmit()
  .create();
}