| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style> | |
| iframe { | |
| height: 400px; | |
| width: 400px; | |
| border: 10px solid black; | |
| box-sizing: border-box; | |
| border-radius: 50%; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <iframe srcdoc=" | |
| <style> | |
| body { | |
| background-color: silver; | |
| margin: 0; | |
| transform: translateZ(0); | |
| } | |
| </style> | |
| "></iframe> | |
| </body> | |
| </html> |