{
   auto c5 = new TCanvas("c5","c5",700,400);
   c5->Divide(2,1);
   auto hz1 = new TH1F("hz1","Bar-chart drawn from 0",20,-3,3);
   auto hz2 = new TH2F("hz2","Lego plot drawn from 0",20,-3,3,20,-3,3);
   Int_t i;
   double x,y;
   hz1->SetFillColor(kBlue);
   hz2->SetFillColor(kBlue);
   for (i=0;i<10000;i++) {
      x = gRandom->Gaus(0,1);
      y = gRandom->Gaus(0,1);
      if (x>0) {
         hz1->Fill(x,1);
         hz2->Fill(x,y,1);
      } else {
         hz1->Fill(x,-1);
         hz2->Fill(x,y,-2);
      }
   }
   c5->cd(1); hz1->Draw("bar2 min0");
   c5->cd(2); hz2->Draw("lego1 min0");
}