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  1. or download this
    #!/usr/bin/perl
    use strict;
    ...
    
    Foo::spew();
    Bar::spew();
    
  2. or download this
    package Foo;
    print "Executing foo.pl\n";
    sub spew {
        print "This is package Foo\n";
    }
    
  3. or download this
    package Bar;
    print "Executing bar.pl\n";
    sub spew {
        print "This is package Bar\n";
    }
    
  4. or download this
    Executing bar.pl
    Executing foo.pl
    This is package Foo
    This is package Bar