Unnumbered Sparks: Crowd-sourced visual artwork

Aaron Koblin, creative director at the Data Arts Team at Google, designed a 745 foot interactive sculpture that lived in Vancouver, Canada from March 15-22, 2014. Visitors with smartphones and tablets were able to choreograph the sculpture in real time. 

See the sculpture in action here: http://www.unnumberedsparks.com/ (best viewed in Chrome)