I think the Berlin Memorial was built to remember the Jews and how they had to sit on yellow benches and to bring back memories and for people to remember what happened to the Jews and why they had to sit there just because of their religion and nationality. I'm not quite sure what the music notes stand for but it might be a song the Jews sung while being transported or in Concentration Camps.
For some years the laws were not really affecting anybody but it started to slowly affect like kids in after school activities and not being able to get candy until the people couldn't go to school or graduate it so they had no ways of making money and living
The people wanting to go to school because some family's may of been poor. So then someone tried to get their family a nice life and nice environment and it completely stops because now Jews couldn't go to school or graduate to support their family's or pursue their dream job.