{
  gROOT->Reset();
  
  // Draw histos filled by Geant4 simulation 
  //   
  //  TFile f("testem12.root");  
  TFile f("compton-pen.root");  
  TCanvas* c1 = new TCanvas("c1", "  ");
  
  TH1D* hist1 = (TH1D*)f.Get("1");
  // hist1->Draw("HIST");
  
  TH1D* hist2 = (TH1D*)f.Get("2");
  // hist2->Draw("HIST");
  
  TH1D* hist3 = (TH1D*)f.Get("3");
  hist3->Draw("HIST");
  
  TH1D* hist4 = (TH1D*)f.Get("4");
  // hist4->Draw("HIST");
  
  TH1D* hist5 = (TH1D*)f.Get("5");
  // hist5->Draw("HIST");
  
  TH1D* hist8 = (TH1D*)f.Get("8");
  // hist8->Draw("HIST");          
}