[pygame] Hello, how to display a background around a active play screen?

[Frank Butcher]

Afternoon,

Please forgive my newbie question.

I am trying to re-create a arcade cabinet design in pygame. So that the cab
displays around the play area.

How can I do this? What I want is say the game to display in 600x400 and
the cab to take up the rest of the screen.

Thanks,

Dan.