def checkNewFollowers(new_list, old_list):
    """
    Checks if elements in the new list are present in the old one
        if not present, saves it into a list of new users (that is, new followers)
    :param new_list: A list of followers generated in this execution
    :param old_list: A list of followers generated in the previous execution
    :return: A list of the difference between the two list (new followers)
    """
    new_followers = list()
    for i in new_list:
        if i in old_list:
            pass
        else:
            new_followers.append(i)
    return new_followers