Change color on checkbox click

Good afternoon,

I am attempting to change the horizontal arrangement when the checkbox inside it is clicked. I can acomplish this when I do it individually, but I would like to do it on a global scale. I keep getting the error

"Property getter was expecting a component but got a YailList instead"

I am not sure what I am missing here, I have searched around for the answer but have come up short. Please see what I have so far.

Thank you!

There must be a component here, not a component list.

Wrap the block with a

  for each Arrangement in global Horizontal_Arrangement
     ser background color of Arrangement to ...

Thank you for help! I am getting closer... when I add the code below it will change the 1st horizontal arrangement but it wont change any of the other arrangements...

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