You still can't believe your luck, but this year, the christmas preparations should be no work at all! You have bought an X-Maton Christmas Preparation Machine, and according to the marketing, this little robotic helper can take care of practically all the work that needs to be done to prepare for the feast.
Naturally, you are still a bit sceptic, possibly because there didn't seem to be any manual included, and the only means to control the device seems to be an array of buttons with small pictograms on top, like a christmas tree or a roast in an oven. It seems pretty clear that you have to press them all to get everything done, but... in which order?
Since you have no idea and you definitely don't want to prepare the house by hand if you can help it, you'll just have to try and see what happens.
Edit: Finished, DL at
www.uni-koblenz.de/~smaxein/Xmaton.zip