void crown()
{
   auto c1 = new TCanvas("c1", "c1", 400, 400);
   auto cr1 = new TCrown(.5, .5, .3, .4);
   cr1->SetLineStyle(kDashed);
   cr1->SetLineWidth(4);
   cr1->Draw();
   auto cr2 = new TCrown(.5, .5, .2, .3, 45, 315);
   cr2->SetFillColor(38);
   cr2->SetFillStyle(3010);
   cr2->Draw();
   auto cr3 = new TCrown(.5, .5, .2, .3, -45, 45);
   cr3->SetFillColor(50);
   cr3->SetFillStyle(3025);
   cr3->Draw();
   auto cr4 = new TCrown(.5, .5, .0, .2);
   cr4->SetFillColor(4);
   cr4->SetFillStyle(3008);
   cr4->Draw();
}