url_func_dict = {}
    for urls in promos_urls:
        for url in urls:
            url_func_dict[url] = promos_urls[urls]
    with concurrent.futures.ThreadPoolExecutor(max_workers=2) as executor:
        # Start the load operations and mark each future with its URL
        future_to_url = {executor.submit(get_html, u): u for u in url_func_dict}
        for future in concurrent.futures.as_completed(future_to_url):
            url = future_to_url[future]
            html = future.result()
            if html[0] == 'error':
                error_counter = error_counter + 1
                print(html[1])
                continue
            else:
                i=url_func_dict[url](html, rooms, url)
                scraped_promos = scraped_promos+i
                print(str(len(i))+' promos were scraped from '+url)
            if not prev_time:
                prev_time = start_time
            print("url took", time.time() - prev_time, "sec to run")
            prev_time = time.time()