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  1. or download this
    { 
  my $foo = "Foo!\n";
...
} 
makefoo();
foo();
  2. or download this
    { 
  my $foo = "Foo!\n";
...
} 
makefoo();
foo();
  3. or download this
    { 
  my $foo = "Foo!\n";
...
} 
makefoo();
foo();
  4. or download this
    my $foo = "Foo!\n";
sub makefoo { 
...
} 
makefoo();
foo();
  5. or download this
    my $foo = "Foo!\n";
sub makefoo {
...
$foo = "Moo!\n";
makefoo();
foo();