Looping a list of videos - setup function (How to open a GMail account - POP3)

I am new to Processing.

I am working on a code that so far is able to open an gmail account using POP3 and projects a video according to the subject text.

Using only the 'subject' I have been able to modify the PATH value of the next expression,

movies = new Movie (this, PATH0)

So when running the program, it opens the gmail account, takes only the subject content and projects a video according to the PATH value.

if (subject.equals("1")){
        movies = new Movie (this, PATH01);
} else if (subject.equals("2")) {
        movies = new Movie (this, PATH02);
} //and so on

What I want to do is to call for the function that checks the email checkMail() right after every video is finished. And in consequence of checking again the email account, the program must project a new video, if the subject line of the email is new or different.

The loop I created has worked badly.

//project movie and loop
void draw() {
  background(255);
  if (movies.available()) {
    movies.read();
  }

  image(movies, 0, 0);
  float md = movies.duration();
  float mt = movies.time();
  int a = int(md);
  int b = int(mt);
  if (a == b) {
  movies.stop();
  checkMail();
  movies.play();
  }
}

It seams to be quite unstable, it opens the email and changes the video about 15 times, no more than that! I have run it too many times... It stops checking the email after the video is finished. If you noticed the checkMail() is part of the setup(), so I am aware that this could be problematic, to call again a function that is in the setup(), but it seems to work, at least a few times. How can I make it run again?

I hope I made myself clear of what I want to do.

Your help will be very very much appreciated, I loosing my mind here...

~~~~~~ HERE IS THE ENTIRE CODE, including the authorizing and opening the gmail account.

// Under the main tab

import processing.video.*;

String PATH00 = "/Users/Documents/Videos/00.mp4";
String PATH01 = "/Users/Documents/Videos/01.mp4";
String PATH02 = "/Users/Documents/Videos/02.mp4";
String PATH03 = "/Users/Documents/Videos/03.mp4";
String PATH04 = "/Users/Documents/Videos/04.mp4";

Movie movies;

void setup() {

  // Function to check mail
   checkMail();
  //create canvas
  size(1280,720,P2D);
  frameRate(24);
  movies.play();
  movies.speed(1);
  movies.volume(1);

}


//project movie and loop
void draw() {
  background(255);
  if (movies.available()) {
    movies.read();
  }

  image(movies, 0, 0);
  float md = movies.duration();
  float mt = movies.time();
  int a = int(md);
  int b = int(mt);
  if (a == b) {
  movies.stop();
  checkMail();
  movies.play();
  }
}

// gmail authorizing tab
//Simple Authenticator          

import javax.mail.*;
import javax.mail.internet.*;
import java.util.*;
import javax.mail.Authenticator;
import javax.mail.PasswordAuthentication;

public class Auth extends Authenticator {

  public Auth() {
    super();
  }

  public PasswordAuthentication getPasswordAuthentication() {
    String username, password;
    username = "YOUREMAIL@gmail.com";
    password = "YOURPASSWORD";
    System.out.println("Authenticating... ");
    return new PasswordAuthentication(username, password);
  }
}

// under the tab MAIL

void checkMail() {
  try {
    Properties props = System.getProperties();

    props.put("mail.pop3.host", "pop.gmail.com");

    // These are security settings required for gmail

    props.put("mail.pop3.port", "995");
    props.put("mail.pop3.starttls.enable", "true");
    props.setProperty("mail.pop3.socketFactory.fallback", "false");
    props.setProperty("mail.pop3.socketFactory.class","javax.net.ssl.SSLSocketFactory");

    // Create authentication object
    Auth auth = new Auth();

    // Make a session
    Session session = Session.getDefaultInstance(props, auth);
    Store store = session.getStore("pop3");
    store.connect();

    // Get inbox
    Folder folder = store.getFolder("INBOX");
    folder.open(Folder.READ_ONLY);
    System.out.println(folder.getMessageCount() + " total messages.");

    // Get array of messages and display them
    Message message[] = folder.getMessages();
    for (int i=0; i < message.length; i++){
      System.out.println("---------------------");
      System.out.println("Message # " + (i+1));
      System.out.println("Message: " + message[i].getSubject());
      String content = (message[i].getSubject());
      if (content.equals("0")){
        movies = new Movie (this, PATH00);
      } else if (content.equals("1")){
        movies = new Movie (this, PATH01);
      } else if (content.equals("2")){
        movies = new Movie (this, PATH02);
      } else if (content.equals("3")){
        movies = new Movie (this, PATH03);
      } else if (content.equals("4")){
        movies = new Movie (this, PATH04);
    }
  } catch (NoSuchProviderException e) {
         e.printStackTrace();
  } catch (MessagingException e) {
         e.printStackTrace(); 
  } catch (Exception e) {
         e.printStackTrace();
  } 
}