On the heels of the tragedy in Paris last year, Geometry Global set out to create a video greeting that would cheer fellow Parisians and show music once again resonating in the streets. They harmonized railings throughout the city to issue a positive message for the year to come. The video ends with the chorus of the Marseillaise, the French national anthem. Take a look to see how very simple technology was used to fine tune some of Paris’s most well-known locations.