This installation coded by using Ardiuno and Processing. They used heart rate transmitter which is sending pulse rate data to Ardiuno and used processing the to visualise this data. The laser light is controlled by the pulse rate. Processing helped the laser light to act considering the speed of the heard. They projected the laser light onto different canvases and increased the effectiveness of the project.
http://www.youtube.com/watch?v=j6K0iud7COE