open(RESULTS2, "ping.txt") || die;
open(RESULTS, ">ping2.txt") || die; *********** someother file **************
@results = <RESULTS2>;
close(RESULTS2);
$j = 0; *************************array's initial subscript
$a = 0; $f = 0;
foreach (@results) { ************** URs went into a loop*
  if (m/Reply/) {
    $output[$j] = $baseIP.$j.": Alive\n";
    print $output[$j]."\n";
    $j++; 
  } elsif (m/Request/) {
    $output[$j] = $baseIP.$j.": Dead\n";
    print $output[$j]."\n";
    $j++; 
  }
}

print RESULTS "Pinger Results:\n\n";
print RESULTS "Alive Nodes: $a\n";
print RESULTS "Dead Nodes: $f\n";
print RESULTS "\n\nDetailed Results:\n";
print RESULTS @output;

**************************************************
Hope this helps. 

Thanks!