Experimental method, based on the ``The poetic truth´´ of the philosopher Gaston Bachelard. From a poetic image as it is the metaphore ``Horizontal Desierta´´, it is stablished a series of formal rules, through a series of images that define the concept of that metaphore. These paths lead us to some forms that have no function and bring up some problems. Finally, we will give a function based on those forms. It is a process of objective knowledge of reality through imagination.