Unlock the truth about Guantanamo by taking part in our latest campaign.

For some time now Amnesty International Sweden has been using the "slide to unlock" function of iPhone and iPad to promote text message activism (the Amnesty urgent actions network).

When the prison camp in Guantanamo turned 10 years (11/1/2012) we helped Garbergs take it all one step furher. We used the large digital billboard at Stureplan (the Times Square of Sweden, oh yes) and an iPad to help symbolize the difference that signatures can make.

Signing the iPad, the billboard reacted simultaneously and the name appeared on the big screen.

For all you technology heads out there - this project is running on NodeJS and Socket.io as a base layer with two different applications on top - one for the iPad and one for the screen.

Paper.js and their path simplification algorithm is used for handling the signature writing and smoothing. Signatures are pushed as base64-data between the socket and the devices - to speed things up!

Working with a lot of different pixel densities (all the screens and the fluorescent lamps had individual densities) turned out to be quite a challenge. To solve the problem with getting animations and interactions to sync across all screens we built a small iPad application that lets you drag and drop guides and helper boxes to map positions and timings.

The campaign attracted a lot of media coverage around the world - read about it as "This weeks best interactive" on Best Ads here, on Adverblog here and on Creativity Online over here.

For Garbergs, winter 2011-2012.