As human activities increasingly reshape microclimates and indoor atmospheres, interactive installations offer a way to study how bodies negotiate space through environmental feedback.This project is an Arduino-based physical prototype that uses airflow as a responsive medium between a person and the surrounding field. The device senses proximity and touch through an ultrasonic distance sensor and a touch electrode, then translates these inputs into coordinated actuation: two stepper motors regulate the canvas motion and the nozzle’s tilt, while a solenoid valve gates a chemically driven air-ejection process to modulate intensity and rhythm. Without relying on fixed, pre-scripted animations, the system produces continuously varying “aeriform strokes” that shift with each approach, pause, and contact. Through this closed loop—body → sensing → actuation → atmospheric trace—the project reframes space as a mutable field shaped by embodied behavior, suggesting a design method in which interaction is not an overlay on space but a mechanism that actively composes it.