host_temp = "hosts"
host_path = r"C:\Windows\System32\drivers\etc\hosts"
redirect = "127.0.0.1"
website_list =['www.facebook.com','facebook.com']

while True:
    if dt(dt.now().year,dt.now().month,dt.now().day,8) < dt.now() < dt(dt.now().year,dt.now().month,dt.now().day,16):
        print("working")
        with open(host_temp,"r+") as file:
            content = file.read()
            for website in website_list:
                if website in content:
                    pass
                else:
                    file.write(redirect+" "+ website+"\n")