"Xi-Pixwall" is a modular sound proof wall system for roadsides. It is flexible and forms a surface for environments and situations while escaping from existing methods providing function-based form. 6 types of block module create 11 levels of shades with light. 11 levels of shades are recognized as pixels and turn the soundproof wall into one large display. Each unit block becoming a pixel is detachable, and easily turns into various images without additional resources. It can change its looks by changes of environment, and it will hopefully become a landmark contributing region and culture as for a communication medium.