void yy()
{
   TEveManager::Create();

   TEveGeoShape* s = 0;

   s = new TEveGeoShape("Tube");
   s->SetShape(new TGeoTube(0, 10, 200));
   s->SetMainColor(kRed);
   // s->SetMainTransparency(50);
   // s->SetNSegments(12);
   gEve->AddElement(s);

   s = new TEveGeoShape("Cone");
   s->SetShape(new TGeoCone(20, 0, 40, 0, 0));
   s->SetMainColor(kRed);
   // s->SetMainTransparency(50);
   // s->SetNSegments(12);
   s->RefMainTrans().MoveLF(3, 200 + 10); // See docs of TEveTrans.
   gEve->AddElement(s);

   gEve->Redraw3D(kTRUE);
}