while (blah)
{... cri cri
if (/this/)
{... cri cri
do thiiiis
}.... cri cri

elseee ....
  {.... cri cri
do thaaaat
 }
}... violins

##</code><code>##

While(blah){
 if(/match/){  do_this()   } 
 else       {  do_that()   } 
 # no, I don't like the "} else" way, you lose the symmetry
}
(blank line here)