def drive():
    """Drive program.

    Sleep for 5 seconds, then refresh page.  If there are available hours,
    click on them.  If no available hours, then reset loop.
    """
    while True:
        time.sleep(5)
        driver.refresh()
        html = driver.page_source
        html_soup = soup(html, "html.parser")
        hour_container = html_soup.findAll("li", {"class": "available"})
        if not hour_container:
            continue
        for hour in hour_container:
            hour.click()