| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <style> | |
| body { | |
| background-color: black; | |
| } | |
| div { | |
| width: 200px; | |
| height: 100px; | |
| border: 4px solid darkgreen; | |
| background-color: green; | |
| position: absolute; | |
| left: 50%; | |
| top: 50%; | |
| margin-left: -104px; | |
| margin-top: -54px; | |
| } | |
| </style> | |
| </head> | |
| <body> | |
| <div></div> | |
| </body> | |
| </html> |