"Layered Mind" is an interactive installation that shows visitor's conditions of mind. Visitor puts on an EEG headband to send brainwave data to pc and "Layered Mind" generates visuals and sounds on transparent LED screens by analyzing visitor's alpha, beta, theta, delta and gamma waves in real time. Brainwaves are research topics that many people are interested in. Human brain normally produces five different types of brainwaves at different times. They can and do change, based on what you’re doing and how you’re feeling. People want to know their real situations or internal conditions. It is said that if alpha waves are higher than other brainwaves, which means you are relaxed. If beta waves are the highest, you are active and busy. Theta waves mean you are sleepy and delta waves mean you are in deep sleep. Gamma waves means you are intensely focused. "Layered Mind" is an interactive installation that shows visitor's conditions of mind with an EEG headband. "Layered Mind" enables visitor's brainwaves to come out on transparent LED screens that aligned in layers in hexagonal structures. This is a new experience for visitors that they see their brainwaves on external objects and create their own art work. Even people with disabilities or ALS patients enjoyed experiencing this art installation. This is a special point of this art installation and anyone can be a creator of an interactive art.