Before revision:  We found that the mechanism underlying the patterning obeys to the dy- namics of a 3-nodes network motif with a double negative feedback loop fed by a morphogenetic gradient that triggers the inhibition in a French flag problem fashion.
After revision:  We found that the mechanism underlying the patterning obeys to the dynamics of an activator-repressor feedback loop fed by a morphogenetic gradient that triggers the inhibition in a French flag problem fashion.