try:
        for i in itertools.count():##range(scrollTimes):
            driver.execute_script("window.scrollTo(0, document.body.scrollHeight);")

            lastTweetCss = "#stream-items-id >li:nth-of-type(" + str(eachCount*(i+2)+1) + ") .tweet-text"
            print lastTweetCss
            elem = WebDriverWait(driver,20).until(EC.visibility_of_element_located((By.CSS_SELECTOR,lastTweetCss)))
            printTweet(driver)
    finally:
		printTweet(driver)
		driver.close()