{
gStyle->SetOptStat(0);

TH1* v[4];
int fs[4]={3004,3005,3006,3007};
int fc[4]={kBlack,kRed,kBlue,kGreen};


for(int i=0; i<4; i++){
   v[i] = new TH1F(Form("h_%i", i), "", 200, -10, 10);
   v[i]->SetFillStyle(fs[i]);
   v[i]->SetFillColor(fc[i]);
   for(int j=0; j<10000; j++) v[i]->Fill(gRandom->Gaus(-7 + i*3, 1.0));
   if(i==0){
      v[i]->Draw();
   }
   else{
      v[i]->Draw("same");
   }
}

}