every person has white and black traces. Black traces are our mistakes and they are in our memory (at best) and remind us that at some time we made a mistake. I would call it a big mistake. After every day we make small mistakes about which we will never remember later.
And the white traces I would call - those traces of which we can recall with a sense of pride. These are the things about which other people will say. This is our city.
The meaning of life can be reduced to two things.

• Strive to make the world better and leave a white trace behind
• Just live your life in your pleasure (or just complain about the surrounding problems, many options)

Everyone decides how to act. To fix attention on "black tracks" or to strive to make "white tracks". People are different:)

This is my interpretation of this photo. I do not impose my opinion on anyone. I aspire to originality.

Thank you and good night :)