Nixie Clock complete with transparent vacuum tubes.
[It's been a while since I've worked with Rainmeter code. If you notice a problem with clock displaying the wrong time (or no time at all), please let me know!]
[UPDATE] I just realized I left some useless code in there, so I removed it. I also added a little note within the code to facilitate users with switching between 12 and 24 hour display modes.