A. Data input from the natural environment: Temperature
Data from http://www.wunderground.com/weather/api/d/documentation.html
* Selected 15 Cities has more than 8,000,000 population according to UN Statistics Division
B. Output visualization: City bubbles. Hotter, bigger
C. Physical input :
1) Button: If a user pushes a button, it will show the information of the city then bubble will go away.
2) Potentiometer: Controls x, y, position of the arrow to select bubble for information
3) Proximity Sensor/ Maxbotix LV-EZ0: a user comes closer to the sensor, bubbles will start moving