https://api.proxyscrape.com/v2/?request=displayproxies&protocol=http&timeout=10000&country=all&ssl=all&anonymity=all
https://www.proxy-list.download/api/v1/get?type=http&anon=elite
https://www.proxy-list.download/api/v1/get?type=http&anon=anonymous
sudo python3 proxy_checker.py <timeout> proxies.txt <protocol http/https/socks4/socks5>