| <!DOCTYPE html> |
| <html> |
| <head> |
| <style> |
| .container { |
| position: relative; |
| width: 30px; |
| height: 30px; |
| margin: 20px; |
| border: 1px solid silver; |
| } |
| |
| .box { |
| position: absolute; |
| background-color: gray; |
| } |
| </style> |
| </head> |
| <body> |
| <div class="container"> |
| <div class="box" style="left: 1px; top: 1px; width: 10px; height: 10px; box-shadow: 0 0 0 1px blue;"></div> |
| </div> |
| |
| <div class="container"> |
| <div class="box" style="left: 1px; top: 1px; width: 10px; height: 10px; box-shadow: 0 0 0 0.5px blue"></div> |
| </div> |
| |
| <div class="container"> |
| <div class="box" style="left: 1px; top: 1px; width: 10.5px; height: 10.5px; box-shadow: 0 0 0 0.5px blue"></div> |
| </div> |
| |
| </body> |
| </html> |
