This little script works for both ordinary and part time timetables + has a bunch of cool QoL features ;)
(It displays the nicer timetable under the original one)
- Go to your courses page (for me its: https://usosweb.ansb.pl/kontroler.php?_action=dla_stud/studia/oceny/index)
- Open the browser Dev Tools F12
- Paste in the code from below