package A;

BEGIN { print "compiling A\n" }

print "executing A\n";

1;

##</code><code>##

package Z;

BEGIN { print "compiling Z\n" }

print "executing Z\n";

1;

##</code><code>##

use strict;
use warnings;

BEGIN { print "compiling script.pl\n" }

use A;
use Z;

print "executing script.pl\n";

##</code><code>##

compiling script.pl
compiling A
executing A
compiling Z
executing Z
executing script.pl