{

    TCanvas* c1 = new TCanvas("c1","2D histogram ", 500, 0, 500, 800);
    c1->Divide(1,2);
    c1->cd(1);
    TH2F* h = new TH2F("h","hist", 10, 0, 10, 10, 0, 10);

    
      h->Fill(0,0,1);
      h->Fill(0,1,1);
      h->Fill(0,2,1);
      h->Fill(0,3,1);
      h->Fill(0,4,1);
      h->Fill(1,0,1);
      h->Fill(1,1,1);
      h->Fill(1,2,1);
      h->Fill(1,3,1);
      h->Fill(1,4,1);
      h->Fill(1,5,1);
      h->Fill(1,6,1);
      h->Draw("colz");

}