Today's public spaces always require the most efficient use. All kinds of things and advertising boards fill the living space, making people's awareness of the beauty of the environment weak. This course hopes that students can connect their understanding of themselves through the observation of light and shadow in nature, extending to the body's perception of light and shadow. The course combines the knowledge of light and shadow from junior high school mathematics, physics, chemistry, earth science and visual arts to explore how wherever there is light, there must be shadow, which is both relative and indispensable. This is a thinking process that transforms knowledge into abstract perception, and then uses changes in light and shadow to create creative imagination and presentation. Finally, I summarize the beauty of light and shadow in life, and hope that students will be willing to reserve some physical space and psychological time in their lives in the future, bring light and shadow into life, and let the beauty happen in the instant when light and shadow change!