We are surrounded by sound, the sound is a environment, and the sound gives this environment the character of an extension. This space is composed of complicated sounds. Any object is making its sound, there are many regularity in the complexity. Like the rustling of leaves blown by the wind, the tickling of raindrops, the hum of the air conditioner outside, the roar of machines in the basement. In this space, I want to separate the regular sounds from the complex sounds and symbolize them. Each symbol represents an environment.