TH1F* MyMacro(int);

TH1F* MyMacro(int count) {
  TH1F *tmp = new TH1F("tmp_hist", "Test Histogram", count, 0, count);

  for(int i = 0; i < count; i++) {
    tmp->Fill(gRandom->Rndm(1)*count);
  }

  return(tmp);
}