The interactive envionmenet is built in Unity, envisioning it as a medium. Sound, people and medium are interacted with each other. Based on two principles, We put eight "sound machines"，they make rotating sounds through their respective black sound speakers.

For interaction with people, as the person gets closer to the speaker, the sound gets progressively louder and the spatial lines produced in the medium get denser; the further the person gets away from the speaker, the sound gets progressively smaller and the spatial lines produced in the medium get sparse.