After watching the old but amazing film WarGames I decided to try and build one of the defcon signs featured in it. Two types of sign appear in the film, a large horizontal one which hangs in the main control room and a smaller vertical sign in an office. This vertical type also appears in at least one Stargate SG1 episode and is the one I decided to replicate.

I toyed with the idea of trying to make a screen perfect copy but I decided to opt for building a simpler less perfect version making use of scrap materials I had.

To add an interesting twist I made use of the MI5 security threat level so it displays real data, although this means I am unlikely to ever get to see what the blue and green (or yellow) lights look like!