:
  :
  :
mkdir $some_dir;
chdir $some_dir; 
  :
  :

##</code><code>##

 |
 |
chdir $some_dir or die "HEY!  I couldn't CD into $some_dir:$!";
  |
  |
mkdir $another_dir or die "OHMIGOD! I couldn't make $another_dir:$!"; 
   |
   |