gistfile1.txt

from time import sleep
from subprocess import run, PIPE

def fetch():
    command = ['curl', 'https://demo.ctf.ninja/challenges/', '-H', 'Cookie: sessionid=*change-me*;']
    return run(command, stdout=PIPE).stdout

def notify():
    command = ['say', 'New challenge!']
    return run(command, stdout=PIPE)

if __name__ == '__main__':
    old_html = fetch()
    while True:
        new_html = fetch()
        if new_html != old_html:
            old_html = new_html
            notify()
        sleep(60)