imageline($this->img, ($x2+1), ($y1-1), ($x2+1), $y2, $this->color['bars_shadow']);
imageline($this->img, ($x2+2), ($y1-1), ($x2+2), $y2, $this->color['bars_shadow']);
imagefilledrectangle($this->img, $x1, $y1, $x2, $y2, $this->color['bars']);
imageline($this->img, ($x2+1), ($y1-1), ($x2+1), $y2, $this->color['bars_shadow']);
imageline($this->img, ($x2+2), ($y1-1), ($x2+2), $y2, $this->color['bars_shadow']);
imagefilledrectangle($this->img, $x1, $y1, $x2, $y2, $this->color['bars']);