I am beginer to this language and my first code is giving me syntax error, please help code:

use strict;
use warnings;
use diagnostics;

my $hero = 'Ovid';
my $fool = $hero;
print "$hero isn't that much of a hero. $fool is a fool.\n";

$hero = 'anybody else';
print "$hero is probably more of a hero than $fool.\n"

my %snacks = (
 stinky => 'limburger',
 yummy => 'brie',
 surprise => 'soap slices',
);
my @cheese_tray = values %snacks;
print "our cheese tray will have: ";
for my $cheese (@cheese_tray) {
        print "'$cheese' ";
}
print "\n";
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error:

@cisnet:~/kodzo_perl/chapter3$ perl example.pl

syntax error at example.pl line 12, near "my "
Global symbol "%snacks" requires explicit package name (did you forget
+ to declare "my %snacks"?) at example.pl line 12.
Global symbol "%snacks" requires explicit package name (did you forget
+ to declare "my %snacks"?) at example.pl line 17.
Execution of example.pl aborted due to compilation errors (#1)
    (F) Probably means you had a syntax error.  Common reasons include
+:

        A keyword is misspelled.
        A semicolon is missing.
        A comma is missing.
        An opening or closing parenthesis is missing.
        An opening or closing brace is missing.
        A closing quote is missing.

    Often there will be another error message associated with the synt
+ax
    error giving more information.  (Sometimes it helps to turn on -w.
+)
    The error message itself often tells you where it was in the line 
+when
    it decided to give up.  Sometimes the actual error is several toke
+ns
    before this, because Perl is good at understanding random input.
    Occasionally the line number may be misleading, and once in a blue
+ moon
    the only way to figure out what's triggering the error is to call
    perl -c repeatedly, chopping away half the program each time to se
+e
    if the error went away.  Sort of the cybernetic version of 20 ques
+tions.

Uncaught exception from user code:
        syntax error at example.pl line 12, near "my "
        Global symbol "%snacks" requires explicit package name (did yo
+u forget to declare "my %snacks"?) at example.pl line 12.
        Global symbol "%snacks" requires explicit package name (did yo
+u forget to declare "my %snacks"?) at example.pl line 17.
        Execution of example.pl aborted due to compilation errors.
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