{
  TCanvas *c1 = new TCanvas("c1","multipads",900,700);
  c1->Divide(1,2,0,0);
  gStyle->SetOptStat(0);

  double time[6] = {0., 15., 30., 60., 90., 120.};
  double data[6] = {1., 0.62, 0.43, 0.32, 0.19, 0.14};
  double err[6] = {0., 0.65, 0.45, 0.34, 0.21, 0.17};
  double ex[6] = {0.};

  for (int ii=0; ii<6; ii++) err[ii] = err[ii] - data[ii];
  
  TGraphErrors *expBELLI = new TGraphErrors(6, time, data, ex, err);  
  
  expBELLI -> SetMarkerStyle(20);
  expBELLI -> SetMarkerSize(2);
  c1->cd(1);
  gPad->SetTickx(2);
  expBELLI->Draw("ap");


  c1->cd(2);
  gPad->SetTickx(2);
  expBELLI->Draw("ap");
c1->Print("c1.png");
}