Update your BE::Shell and get snowflakes on your desktop.
Copy this line in your runner or terminal: " qdbus org.kde.be.shell /Desktop merryXmas " and wait some seconds...
(use same command to turn off the snow flurries)
comment by the author:
"this toggle will only work during december ;-P
Notice that it causes some CPU load
also consting a bunch of stuff since despite all
concessions, repainting QWidget for this is rater imperformant"
Thank you Thomas!