Hi! Thanks, a step further :-) and now ..

foreach my $row (@sensor_h)
{
  push(@draw, { file => "../data/$row.rrd", legend => "Source 1", thic
+kness => 2, color => '00FF00' });
}
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$rrd->graph(
  #image          => '-',
  image => "../images/" . $sensor . ".png",
  vertical_label => 'Sensors',
  width          => $width,
  height         => $height,
  start          => time() - $period,
  draw           => { file => "../data/sensor1.rrd", legend => "Source
+ 1", thickness => 2, color => '00FF00' },
  draw           => $draw[0],
  draw           => $draw[1],
  ... and so on ...

);
[download]

yes, so works but i need to pass or join a hash with more draw occurrences thanks