void PlotTwo() {


   TCanvas *c1 = new TCanvas("c1","multipads",900,700);
   gStyle->SetPadBorderMode(0);
   gStyle->SetOptStat(0);
   gStyle->SetOptTitle(0);

   c1->Divide(2,2,0,0);

   TH1F *h1 = new TH1F("h1","test1",20,-3,3);
   h1->SetMarkerStyle(21);
   h1->Sumw2();
   TH1F *h2 = (TH1F*)h1->Clone("h2");
   TH1F *h3 = (TH1F*)h1->Clone("h3");


   TH1F *h4 = (TH1F*)h1->Clone("h4");
   h1->FillRandom("gaus",500); h1->SetMaximum(80);
   h2->FillRandom("gaus",300); h2->SetMaximum(80);
   h3->FillRandom("gaus",900); h3->SetMaximum(130);


   h4->FillRandom("gaus",500); h4->SetMaximum(130);
   
   c1->cd(1);
   gPad->SetBottomMargin(0);
   gPad->SetRightMargin(0);
   gPad->SetTickx();
   h1->GetYaxis()->SetTitle("Number of events");


   h1->Draw();
   
   c1->cd(2);
   gPad->SetLeftMargin(0);
   gPad->SetBottomMargin(0);
   gPad->SetTickx();
   gPad->SetTicky();
   h2->GetYaxis()->SetLabelOffset(0.01);

   h2->Draw();

   
   c1->cd(3);
   gPad->SetTopMargin(0);
   gPad->SetRightMargin(0);
   gPad->SetGridx();
   gPad->SetGridy();
   h3->Draw();

   c1->cd(4);
   gPad->SetLeftMargin(0);


   gPad->SetTopMargin(0);
   gPad->SetTicky();
   gPad->SetGridx();
   gPad->SetGridy();
   h4->GetXaxis()->SetTitle("X title");
   h4->Draw();
}