So I remember seeing a video not too long ago of people doing the same thing- in fact I just found it again. So basically, its just tons of people that wear these jackets that has one color on the back, one on the front, and a third color that they can flap open on the inside of the jacket. The idea is similar to the people who hold up cards in the bleachers- and each person’s card is part of a larger picture- when you put them all together- you get a huge picture. Same idea here- but they actually do it with people. The display they put on is unbelievable and it really makes you wonder how they even managed to organize the whole thing. You just have to watch the video. Its ridiculous.
p.s- Go Korea!