The tight fit between different subsystems of the bottom-up system establish the terminal to be an integrated whole which will read as one complex system on the site instead of three different buildings on three sites. Based on the concept, utilizing the hair system and particle studies, we generated the envelope and connections of the 24/7 Terminal. These dynamic modeling tools have a counterpart relationship, the hair system is extensive and particle is intensive. The hair system studies how the building envelope will organize the space from the site influences. And, the particle system is used to figure out how the interaction between different components will form the inner space and circulation. The programmatic function will be limited by the envelope design which is developed in a way to allow for different types of enclosed and open spaces. The envelope creates a boundary for the circulation. Each component will generate a pattern within the system, the terminal will be a large scale and open space, the commercial will be open and enclosed area, and the residential will be a smallest private enclosed space. Patterns emerge over multiple iterations, without repeating exactly.