Python: Keep checking new email and alert of furth

I have this code that checks the latest email and then goes and does something. Is it possible to write something that keeps checking the inbox folder for new mail? Although I want it to keep checking for the latest new email. Is it getting too complicated if I try and store that it has made one pass? So it doesn't alert about the same email twice about the same email.

Code:

import imaplib
import email
import Tkinter as tk

word = ["href=", "href", "<a href="] #list of strings to search for in email body

#connection to the email server
mail = imaplib.IMAP4_SSL('imap.gmail.com')
mail.login('xxxx', 'xxxx')
mail.list()
# Out: list of "folders" aka labels in gmail.
mail.select("Inbox", readonly=True) # connect to inbox.

result, data = mail.uid('search', None, "ALL") # search and return uids instead

ids = data[0] # data is a list.
id_list = ids.split() # ids is a space separated string
latest_email_uid = data[0].split()[-1]

result, data = mail.uid('fetch', latest_email_uid, '(RFC822)') # fetch the email headers and body (RFC822) for the given ID


raw_email = data[0][1] # here's the body, which is raw headers and html and body of the whole email
# including headers and alternate payloads

.....goes and does other code regarding to email html....

Try to use this approach:

Logic is the same as from @tripleee comment.

import time
word = ["href=", "href", "<a href="] #list of strings to search for in email body

#connection to the email server
mail = imaplib.IMAP4_SSL('imap.gmail.com')
mail.login('xxxx', 'xxxx')
mail.list()
# Out: list of "folders" aka labels in gmail.
latest_email_uid = ''

while True:
    mail.select("Inbox", readonly=True)
    result, data = mail.uid('search', None, "ALL") # search and return uids instead
    ids = data[0] # data is a list.
    id_list = ids.split() # ids is a space separated string

    if data[0].split()[-1] == latest_email_uid:
         time.sleep(120) # put your value here, be sure that this value is sufficient ( see @tripleee comment below)
    else:
         result, data = mail.uid('fetch', latest_email_uid, '(RFC822)') # fetch the email headers and body (RFC822) for the given ID
         raw_email = data[0][1]
         latest_email_uid == data[0].split()[-1]
         time.sleep(120) # put your value here, be sure that this value is sufficient ( see @tripleee comment below)