  We examine a toy model and a cascade effect for confinement and chiral
symmetry breaking which consists in several phase transitions corresponding to
the formation of bound states and chiral condensates with different number of
fermions for a strong group. We analyze two examples: regular QCD where we
calculate the "four quark" vacuum condensate and a preon composite model based
on QCD at higher scales. In this context we also determine the number of
flavors at which the second chiral and confinement phase transitions occur and
discuss the consequences.
