I imiagine there is more that one way, but assuming PER is a record delimiter, you need to check if you have hit a delimiter and then start grabbing data. I would wonder though if all of your records look like this (ie, all on one line) why do you need a delimiter?

Anyway, assuming you do need the delimiter:

/usr/bin/perl-Tw
use strict;

use Text::ParseWords;
open(DATA,"basicdez.dat") || die "Cannot open datfile: $!\n";
my @data;
my $i = 0;
my $new_record=0;
while (<DATA>)
{
  chomp;
  last if /^"EOS"$/;
  if (/^PER\s*$/) {
     $new_record=1;
  }
  elsif ($new_record) {
     @data = &quotewords('\s+', 0, $_);

     print "Name   = $data[0]\n";
     print "Color  = $data[1]\n";
     print "Date   = $data[2]\n";

     $new_record = 0;
  } 
}
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