Soccer club NAC (Breda) light app. Creating light effect during gameplayPurpose of the app: Soccer club NAC (Breda, the Netherlands) has every year a (friendly) gameplay that is called Evening NAC (Dutch: Avondje NAC). During the game we will ask the audience (approx. 7000 - 10000 people) to start the app so all the sponsors of the event are able to color the displays of all the devices running the app. Hopefully this will create a nice light-effect.