<!DOCTYPE HTML> <head> <style> .parent { width: 200px; height: 200px; overflow: hidden; border-radius: 0px 0px 20px 0px; position: absolute; z-index: 0; background-color: #00ff00; } .child { width: 300px; height: 300px; margin-left: 100px; background-color: #ffff00; } body { margin: 0; } </style> </head> <body> <div class="parent"> <div class="child"></div> </div> </body>