Learn CSS Variables by Building a City Skyline - Step 105

*For some reason my code isnt working. I know its right. Im just not so sure why FCC isnt accepting it.

background: repeating-linear-gradient(
      var(--building-color2),
      var(--building-color2) 12%,
      var(--window-color2) 12%,
      var(--window-color2) 44%
    )

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Challenge: Learn CSS Variables by Building a City Skyline - Step 105

Link to the challenge:

Give it a 90deg direction

Please also post all the selector code.