This project takes the simplest way and the most direct expression. We create a "lake" and a "moon" to express the atmosphere of a scene in which a moon rises from the lake, which lights up the whole space. A round pneumatic device floats above the water. During the day, reflected by natural sunlight, the round pneumatic device is like a sun on the lake, shining with dazzling crystal white light. At night, the yellow light of the installation lights up, and the reflections on the sparkling water pour over the flakes of starlight.