THStack *hs = new THStack();
int hi=0;

void Addtohs (TH1F *h)
{
   hi++;
   TH2F *h2 = new TH2F(Form("h2_%d",hi),Form("h2_%d",hi),10,0,1,7,0,1);
   int n = h->GetNbinsX();
   for (int i=1; i<=n; i++) {
      h2->SetBinContent(i,2*hi,h->GetBinContent(i));
   }
   h2->SetFillColor(hi*2);
   hs->Add(h2);
}

void h1in3d() {

   auto h1 = new TH1F("h1","h1",10,0,1);
   auto h2 = new TH1F("h2","h3",10,0,1);
   auto h3 = new TH1F("h3","h3",10,0,1);

   h1->SetBinContent(1 ,1);
   h1->SetBinContent(2 ,2);
   h1->SetBinContent(3 ,3);
   h1->SetBinContent(4 ,4);
   h1->SetBinContent(5 ,5);
   h1->SetBinContent(6 ,5);
   h1->SetBinContent(7 ,4);
   h1->SetBinContent(8 ,3);
   h1->SetBinContent(9 ,2);
   h1->SetBinContent(10,1);

   h2->SetBinContent(1 ,5);
   h2->SetBinContent(2 ,4);
   h2->SetBinContent(3 ,3);
   h2->SetBinContent(4 ,2);
   h2->SetBinContent(5 ,1);
   h2->SetBinContent(6 ,1);
   h2->SetBinContent(7 ,2);
   h2->SetBinContent(8 ,3);
   h2->SetBinContent(9 ,4);
   h2->SetBinContent(10,5);

   h3->SetBinContent(1 ,1);
   h3->SetBinContent(2 ,2);
   h3->SetBinContent(3 ,3);
   h3->SetBinContent(4 ,4);
   h3->SetBinContent(5 ,5);
   h3->SetBinContent(6 ,6);
   h3->SetBinContent(7 ,7);
   h3->SetBinContent(8 ,8);
   h3->SetBinContent(9 ,9);
   h3->SetBinContent(10,10);

   Addtohs(h1);
   Addtohs(h2);
   Addtohs(h3);

   hs->Draw("lego1 0");

}