Santa

I've blipped previously about a somewhat complicated Secret Santa game my friends and I had agreed to do this year. My gift arrived arrived a couple of weeks ago, and a rather ingenious device it is too, but I waited until Christmas Day before putting it up in the house.

Here it is as my Blip for today. I haven't quite worked out all five of the components used in its construction, but all will be revealed when we meet up on New Year's Day.