@matrix = ([3, 4, 10, 2],
           [2, 7, 12, 3],
           [0, 3, 4, 5],
           [6, 5, 9, 11]);
      
for($row = 0; $row < 2; $row++) {
   for($col = 0; $col < 2; $col++) {
      print "$matrix[$row][$col] ";
   }
   print "\n";
}