Today I saw a very interesting exhibition at the History of Tate Modern. The second floor of exhibition is related to color. Although the display on the video has failed, which should show the yellow and purple shadows in the front and back of the circle, I still feel very cool. I can understand the principle of light refraction, but what I am curious about is how the designer turns all the people’s shadows into yellow. If this idea is considered part of the landscape design, it should be very interesting.