What is wrong with this?

when I tried to change the color of in object from the instructions of this and save it in my editor a weird error pops up, here is my code:
Screen Shot 2020-08-18 at 5.57.28 PM
and here is the error:
Screen Shot 2020-08-18 at 5.58.08 PM
Does anybody know what is going on?

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never mind I just had to reload the page

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