def download_images(start_url: str, filetypes: List[str]) -> None:
    """.."""
    base_url = get_base_url(start_url)
    # print(start_url)
    soup = get_soup(start_url)  # ;print(soup)
    if soup is not None:
        for index, image in enumerate(soup.select('img')):  # print(image)
            # image_raw = str(image)
            src_raw = str(image.get('src'))  # print(image.attrs['src'])
            if src_raw.startswith('http'):
                image_url = src_raw
            elif src_raw.startswith('/'):
                image_url = base_url + src_raw
            else:
                image_url = src_raw
            # print(image_url)
            for image_type in filter(lambda x: x in src_raw, filetypes):  # print(image)
                image_response = requests.get(image_url, stream=True)
                if image_response.status_code == 200:
                    image_name = re.sub(r'.*/', '', src_raw).replace(R'.', '_')
                    # print(image_name, index)
                    fp: BinaryIO = open(save_image_dir + '/' + image_name + str(index) + image_type, 'wb')
                    fp.write(image_response.content)
                    fp.close()