Pacman, Tin Tin and Spongebob Squarepants have started popping up in hundreds of office windows across France as workers wage an unconventional 'post-it war'.
La guerre des Post-it, or 'the post-it wars', is a corporate collage contest currently taking place in dozens of Paris offices.
It involves workers creating pop art of ever-increasing complexity out of thousands of post-it notes stuck to their windows.
Executives from competing firms meet to compare their work and plan how to best each other creations in the ongoing 'war'.
Companies including Coca-Cola France, advertising agencies and TV News channels have signed up to the contest.