French street artist, Mademoiselle Maurice, learned the art of origami when living in Japan in 2011. After mastering the craft, she began a quest to stimulate positive emotions by adding some color to the streets of city’s around the globe, including Hue.
You can see more pictures and learn about the project on her website.
Here's a video about the motivation behind her art (it's in French but you can get the general idea if you turn on captions):
