This is dang cool. There is apparently a Post-It note art craze going on in Europe at the moment. It apparently started in Paris:
In fact, across the French capital, the summer has been enlivened by a corporate collage contest known as La guerre des Post-it (the Post-it wars). The battle is between presumably underemployed office workers who are devoting large chunks of their days to sticking thousands of pink, yellow, orange and green notes on their windows to recreate pixelated images.
There’s even a Post-It War website.
Lots of photos here.
And here’s a video (in Dutch).
And it’s spreading around Europe.