void test(){
  TCanvas *c44 = new TCanvas("c44","c44",200,10,600,400);
  double ax[] = {0, 1, 2, 3, 4};
  double ay[] = {0, 2, 4, 1, 3};
  double aexl[] = {0.1, 0.2, 0.3, 0.4, 0.5};
  double aexh[] = {0.5, 0.4, 0.3, 0.2, 0.1};
  double aeyl[] = {1, 0.5, 1, 0.5, 1};
  double aeyh[] = {0.5, 1, 0.5, 1, 0.5};



  TGraphAsymmErrors* gae = new TGraphAsymmErrors(5, ax, ay, aexl, aexh, aeyl, aeyh);
  gae->SetFillColor(2);
  gae->SetFillStyle(3001);
  gae->Draw("a2");
  gae->Draw("p");
  DrawExclusion(0.5,0.8,-1.5,5,3008,kBlue,"Ex1");
  //c44->Modified();
  //c44->Update();
  DrawExclusion(3.2,3.5,-1.5,5,3008,kGreen,"Ex2");
  c44->Update();

}


TCutG* DrawExclusion (double Xlow, double Xhigh, double Ylow, double Yhigh, unsigned int fillStyle, unsigned int color,TString name){
  TCutG* ExclusionZone = new TCutG(name.Data(),5);
  ExclusionZone->SetVarX("");
  ExclusionZone->SetVarY("");
  ExclusionZone->SetPoint(0,Xlow,Ylow);
  ExclusionZone->SetPoint(1,Xhigh,Ylow);
  ExclusionZone->SetPoint(2,Xhigh,Yhigh);
  ExclusionZone->SetPoint(3,Xlow,Yhigh);
  ExclusionZone->SetPoint(4,Xlow,Ylow);
  ExclusionZone->SetFillColor(color);
  ExclusionZone->SetFillStyle(fillStyle);
  ExclusionZone->Draw("F");

  return ExclusionZone;
}