NATION - How to change background color "block - bottom"

Maybe I'm blind too - or just too inexperienced. Hence my little question in the Theme Nation.

In your sample data "Page Home Business 01" the background of the blocks -> Bottom (first / second / third) and CopyRight is black ... where can I set that ...

Thank you very much for your effort

You play FNF as a 19-year-old rap battler named "Boyfriend." Weeks are the levels, and each week consists of three rap battles for the song "Boyfriend." Boyfriend competes against "Girlfriend's" father in the first week, who sits in the background atop a stereo during the battle. The second week features "Skid" and "Pump," two children dressed as a skeleton and a pumpkin, respectively. Week three introduces you to Pico, a redhead who challenges you to a subway rap battle. You battle Girlfriend's mother in week four, and both of Girlfriend's parents in week five. Friday night funkin or FNF is a free rhythm game to play with friends.

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