This year, Elefant holds nothing more and nothing less than his twentieth birthday, why the festival Indietracks English has decided to allocate part of the festival and provide the main stage to bring the best independent label groups. Indietracks is between 24 and July 26 at Butterley in its cartel is already confirmed as large groups (and so close to us) as a module, Au Revoir Simone, Fitness Forever, Camera Obscura, Cola Jet Set, Stereototal, Cooper or The Blue House. An example of fitness proportionate selection. r is a random number selected from 0 to F in this case individual B has been selected.