for my $i (0..$#files) {
 if ($i % $width == 0) { # new row, append to dimension X
   push (@images, { schleifeY => [ { inhalt => $files[$i], NUMBER => $ziel } ] } );
 }
 else { # new column, append to dimension Y
   push (@{ $images[-1]->{schleifeY} }, { inhalt => $files[$i], NUMBER => $ziel } );
 } # else
} # for

$template->param(schleifeX => \@images);