Since this router does not have beeper and you can’t play songs on it, but it does have controllable LEDs, so you can give it some Christmas vibes.
Video: https://i.imgur.com/8380H4K.mp4 (imgur post).
WARNING - High amount of sector writes. It will eventually kill your flash storage with the time.
Do some initial configuration:
# Disable modem-signal functionality for leds
/system leds set [find where type=modem-signal] disabled=yes
# Add dummy rule so led1 is enabled
/system leds add type=on leds=led1
Then add below scheduler:
/system scheduler add interval=1s name=schedule1 on-event="/system leds set [find where type=on] leds=led2,led4\r\
\n:delay 0.25\r\
\n/system leds set [find where type=on] leds=led1,led3,led5\r\
\n:delay 0.25\r\
\n/system leds set [find where type=on] leds=led2,led4\r\
\n:delay 0.25\r\
\n/system leds set [find where type=on] leds=led1,led3,led5\r\
\n:delay 0.25" policy=ftp,reboot,read,write,policy,test,password,sniff,sensitive,romon start-date=dec/22/2020 start-time=22:07:44