help pls, how to change the name of interests boxes?

This is what I have on my profile, just write whatever you want inside the quotation marks and put this code somewhere inside your main code (between the <style> tags) :)

:root {

  --topic1: "";

  --topic2: "";

  --topic3: "";

  --topic4: "";

  --topic5: "";

  --topic6: "";

it doesn't work :(