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- <!doctype html>
- <html><head>
- <title>Circular border</title>
- <style>
- body { margin: 0 }
- div {
- margin-left: 8px; margin-top: 8px;
- width: 50px; height: 50px;
- border: 10px solid black;
- border-radius: 10px;
- }
- div > div {
- margin: 0; width: 50px; height: 50px;
- border-radius: 0;
- background: black;
- border: none;
- }
- </style>
- </head>
- <body><div><div></div></div></body></html>
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