{ 

   RooRealVar mes("mes","",-5,5);
   RooRealVar sigmean("m","",0);
   RooRealVar sigwidth("s","",1);
   RooGaussian signal("signal", "signal PDF", mes, sigmean, sigwidth);

   RooPlot * frame = mes->frame(); 

   signal.plotOn(frame);

   frame->getAttLine()->SetLineColor(kBlue);
   frame->getAttFill()->SetFillColor(kRed);
   frame->getAttFill()->SetFillStyle(3013);
   frame->Draw();
}