Louka is a group of modular lights, connected to the phone geolocalisation of your family and friends. Each cube of light is associated with one of your relatives. Their distance from your light is expressed the light intensity. Louka compares their distances to each other. The light attributed to the nearest person is hight in intensity whereas the farthest get a low light intensity. Also, your relatives can send you some lightning thoughts and drawings thanks to the app.