A projector, a tiny camera.
Photoshop, facial recognition software, Premiere
It's an interactive video installation. Through this installation, I experimented with the relationship between emotion and time. The viewers' facial expressions would control the speed of the video playing.
According to scientific research, when a person is in the bad mood, her/his "time" would pass slower than normal, when a person is happy, her/his "time" would pass faster than normal.