Learn CSS Variables by Building a City Skyline - Step 105

Tell us what’s happening:
keeps saying I should have variable --builing-color2 as my first color though I believe I do.
Your code so far

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 background: repeating-linear-gradient(
      var(--building-color2),
      var(--building-color2) 5%,
      transparent 5%,
      transparent 10%
    ), repeating-linear-gradient(90deg var(--building-color2) 0%, 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

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Can you post the code?