How do I get an image to display in google script?

I am working on a script for someone, and while I have the text part of it down, He also wants the logo to appear above the text in the email. Here is my code:

    function myFunction(e) {
  var userResponse1 = e.values[1];
  var userResponse2 = e.values[2];
  var userResponse3 = e.values[3];
  var userResponse4 = e.values[4];
  var userResponse5 = e.values[5];
  var userResponse6 = e.values[6];
  var subject = "LOC - Declaration Confirmation";
  var userEmail = e.values[7];
  /**var a = this.createElement("img");
  a.src = "http://ift.tt/1HLoGDW";**/
  var message = "Band Name: " + userResponse1 + "\n" + "Class: " + userResponse2 + "\n" + "Performance Time: " + userResponse3 + "\n" +
    "Comment only groups: " + userResponse4 + "\n" + "Absences or other information: " + userResponse5 + "\n" + "Your name: " + userResponse6;

  MailApp.sendEmail(userEmail, subject, message);

Thanks in advance