<!DOCTYPE html> <html> <head> <style> .exampleBlock{ content:""; border:20px lightgreen groove; border-left-color:red; border-right-color:lightblue; border-bottom-color:yellow; margin:15px; float:left; } </style> </head> <body> <div class="exampleBlock"></div> <div class="exampleBlock" style="border-width:30px;"></div> <div class="exampleBlock" style="border-width:40px;"></div> <div class="exampleBlock" style="border-width:50px;"></div> </body> </html>
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