Python Selenium Auto Refresh Webpage

This a.py code uses "geckodriver.exe" in same directory to auto refresh a webpage until specified string is found.


from selenium import webdriver
from selenium.webdriver.common.keys import Keys
import time

driver = webdriver.Firefox()
while True:
    driver.get("http://www.aegpromotion.com/mayday2019")
    if "The system is currently processing ticketing purchase by a large number of customers" not in driver.page_source:
        break
    print('waiting 6 seconds')
    time.sleep(6)
input("Great!")
driver.close()