<!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>CSS Masking: mask-position: position mask layer image</title> <link rel="author" title="Astley Chen" href="mailto:aschen@mozilla.com"> <link rel="author" title="Mozilla" href="https://www.mozilla.org"> <style type="text/css"> div.outer { position: relative; width: 100px; height: 100px; border: 1px solid black; } div.inner { position: absolute; width: 50px; height: 50px; background-color: purple; } #inner1 { right: 10px; bottom: 35px; } #inner2 { right: 30px; bottom: 25px; } </style> </head> <body> <div class="outer"><div class="inner" id="inner1"></div></div> <div class="outer"><div class="inner" id="inner1"></div></div> <div class="outer"><div class="inner" id="inner2"></div></div> <div class="outer"><div class="inner" id="inner2"></div></div> </body> </html>