The design of light is closest to the idea of designing time. Even with one's eyes closed, the design of time can be felt strongly when the stress of musical phrases or sounds flow through space. However, changes in light represented the flow of time over 10 times more effectively than the flow of sounds in our daily lives. Just as the sensation of time represents death, there is nothing more excruciating than staying in an environment with invariable light. The work of designing light is always to structure the flow of time. Creating picture books of light is digging into the drama of architecture and people justise when time changes, people's eyes constantly move to appreciate space, comparing different types of light in a space in every different direction.

How should we set the brightness of one particular space in relation to another one? How can we smoothly connect through spaces from white light in one space to orange light in another we cannot avoid designing sequentially