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Speaking of the border wall, it once symbolized the tragedy of the division between East and West Germany during the Cold War era, but now many people may think of President Trump's remarks about building one on the border between the United States and Mexico. Such walls have been built in various places throughout the ages. The main reason for this is likely to be hostility toward neighboring countries arising from differences in ethnicity, religion, ideology, etc., as well as economic disparities. According to Wegener's theory of continental drift, about 200 million years ago, the continents that are now separated, such as America, Africa, and Eurasia, were almost unified, and the continents that are now separated were gradually moved to form the current topography. After that, many nations were established through various circumstances. The venue was decorated with a current map of the world, with the shape of the borders taped to the terrain that was once a single mass.The map was taped in the shape of a border line. Robots were placed on the map and moved around the frame in response to line sensors. The robots could be guards protecting the border,They can also be thought of as people who are forbidden by state authorities to immigrate to a foreign country.Bamboo fences are placed along the border, and the light emitted by the robots changes the silhouettes of the fences from moment to moment, indicating the state of the border, which is still changing due to invasions and civil strife.This work is a device that makes us aware of the meaning of borders.