| <!doctype html> | |
| <meta charset="utf-8"> | |
| <title>Corner Clipped Background Color</title> | |
| <style> | |
| html { | |
| background-color: green; | |
| } | |
| #a { | |
| top: 20px; | |
| left: 20px; | |
| position: absolute; | |
| width: 20px; | |
| height: 20px; | |
| background-color: black; | |
| } | |
| </style> | |
| <div id="a"></div> |