Learn CSS Variables by Building a City Skyline - Step 104

Tell us what’s happening:
hello, i have a background property but its not letting me pass ?

Your code so far

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The challenge seed code and/or your solution exceeded the maximum length we can port over from the challenge.

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Please copy/paste all the editor code showing in the challenge from where you just linked.

Replace these two sentences with your copied code.
Please leave the ``` line above and the ``` line below,
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Challenge: Learn CSS Variables by Building a City Skyline - Step 104

Link to the challenge:

We’ll need to see your CSS in order to help you. To display your code in here you need to wrap it in triple back ticks. On a line by itself type three back ticks. Then on the first line below the three back ticks paste in your code. Then below your code on a new line type three more back ticks. The back tick on my keyboard is in the upper left just above the Tab key and below the Esc key.