OT: The Gulf Building in Pittsburgh (though the name may have changed by now, since Gulf left as far as I know) used to have the same feature, to give the weather forecast. Sadly, though, now it just stays goldish-white.
Also in Pittsburgh, the Grant Building has one of the most interesting lighting ideas I've ever seen. A huge red triangular light sits atop the building, and flashes the letters P-I-T-T-S-B-U-R-G-H in Morse Code. How great is that? ;)
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How dare you vanquish the Steel Phantom without his consent? Fear the Phantom's Revenge.