Blue large piece in Clusters geolocates it's position, collects outdoor air pollution data every 10 min, and adjust their moving speed according to the air pollution levels. Orange large piece in Clusters have temperature, humidity, barometric pressure, and gas sensors(to measure dangerous gases for human health). When the airquality is good they move faster if the airquality is unhealthy either indoors or outdoors the pieces shrivel up and stop moving. These two pieces together lets the users compare and be aware of the indoor and the outdoor air quality.