sub values;
@X;
use strict;
# P is a package which has some subroutines and variables that I need to use in my script.
use P qw(
  $CurDir
  $a2
  &guest
  &guest2
);

my $test = "TEST";
my $testdir = "$CurDir/$test";

# QUESTION: Do I need to use 'my' for these variables?
# ERROR: If I don't use 'my' I get the error saying that $test requires explicit package name.
# If I don't use 'my' don't they automatically become global? Are they not available for use?

&values();
&guest();
&guest2( @X, "$test");

# QUESTION: I get an error saying that @X requires explicit package name.
# How are global variable defined in a perlscript and how can they be used, for the stuff I am doing in this script?

sub values{

@X = (
something
something
);

# QUESTION: Same error as above! Need Explicit Package name.
}