My contribution to Biernes, a traveling urban exhibit from Madrid designed to be seen by bike.
Biernes started last year with the intention of promoting the use of bicycles for transportation at least one day a week. Like in a Friday for instance ;)
(Friday is Viernes in Spanish, but Biernes it's spelled with a big bicycle B)

This year the show will travel to different cities throughout Spain and also to Oaxaca, México.