$graph->set(
             transparent       => '0',
             bgclr             => 'lgray',
             boxclr            => 'white',
             fgclr             => 'white',
             x_label           => 'X Label',
             y_label           => 'Y label',
             title             => 'Some simple graph',
             y_max_value       => 8,
             y_tick_number     => 8,
             y_label_skip      => 2
             ) or die $graph->error;