The design of Bostanchi office, which works in the field of design, production and implementation of mechanical installation systems for large-scale projects, began with the arrangement of various functions on the 2 floors of Nasl building located on Fereshte Street in Tehran, the main focus is the design of the seventh floor with a size of 750 square meters, we tried to create a suitable layout by separating noisy functional spaces from low noise ones. In this way, we have to place more than 70 personnel in the form of different departments, quiet functional spaces were assigned to open spaces and noisy departments to closed spaces.In designing the entrance of the project, we tried to create a different image for the audience and represent the impact of the audience’s movement with light and air flow. Invite the audience from the bright space outside to the dark space in front of the entrance space.In this way, when the audience moves the wall covered with small fans in pixel form, the track of the audience’s passage is visible on the side wall and a number of fans are turned on and the flow of light and air is spread in the space.