Code

import time, os
from playsound import playsound

def follow(thefile):
    thefile.seek(0,os.SEEK_END)
    while True:
        line = thefile.readline()
        if not line:
            time.sleep(0.1)
            continue
        yield line

if __name__ == "__main__":
    logfile = open(os.getenv("APPDATA")+"/.minecraft/logs/latest.log", "r")
    loglines = follow(logfile)
    for line in loglines:
        if "legendary" in line or "Legendary" in line or "Ultimate" in line:
            print('Legendary spawned!')
            playsound('C:\Drivers\Ding.wav')
            time.sleep(1)