{
   TH1D * hist = new TH1D("htemp", "ttt", 100, 0, 3);
	TGraph *gr = new TGraph(2);
	gr->SetPoint(0, 1,1);
	gr->SetPoint(1, 2,2);
   gr->SetHistogram(hist);  // comment this line to make it work
	gr->Draw("a*");
	gr->GetHistogram()->GetXaxis()->SetAxisColor(4);
	gr->GetHistogram()->GetYaxis()->SetAxisColor(2);
	TFile f("ttt.root", "RECREATE");
	gr->Write();
}