Today I finally go around to putting up the Christmas tree in my office (the main tree went up in November after a bribe of mince pies). I was gifted some rude tree decorations a few Christmases ago, and got myself a nice black Christmas tree to go with my grinchy feelings, topped with a black Santa hat.

Last year I found a MAX72 LCD matrix display and set about turning it into a tree decoration to display some festive messages. As ever, Arduino libraries make it really simple. For a Uno/Nano use the following pins: