One of the commentators reaffirmed that this is not computer generated:
They are using Digital Lights and other Media Servers, like High End DL3 units, or a Green Hypo Hypotizer. You can see the lights often moving across the front of of the building as the visual media is played back in sync with the light’s position. Usually, this is all designed by a creative team made up of a lighting designer, media designer and a couple of lighting programmers.
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