Add a linear-gradient to .bb2b that uses --building-color2 from 0% to 6% and --window-color2 from 6% to 9%.
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**Challenge:** Step 51
**Link to the challenge:**
https://www.freecodecamp.org/learn/2022/responsive-web-design/learn-css-variables-by-building-a-city-skyline/step-51
just read it again and its example what exactly its saying you have to write first color for 0% and again first color for 6% same way you can follow .
hope this can be helpful.