Post-it notes used to create a drawing on a window, in Issy-les-Moulineaux (France).
<a rel="nofollow" class="external text" href="https://www.flickr.com/people/39483448@N07">Elen Nivrae</a>
CC BY 2.0
<a href="//commons.wikimedia.org/wiki/Flickr" class="mw-redirect" title="Flickr">Flickr</a>: <a rel="nofollow" class="external text" href="https://www.flickr.com/photos/39483448@N07/6005796567">IMGP0455</a>