This document describes Mumina's design for an automatic window controller. The controller uses an Arduino Uno, moisture sensor, and servo motor to open and close windows automatically based on a timed schedule and detection of rain. It aims to prevent water damage to homes and offices by closing windows when rain is sensed. The design was tested and performed as expected, opening windows every 12 hours and closing them when the sensor detected rain. It provides an effective solution to automatically control windows without needing someone present.