<!DOCTYPE HTML> <html> <head> <style> .wackeddiv { position: fixed; left: 20px; top: 20px; width: 50px; height: 50px; border: 2px solid highlight; background-color: transparent; -moz-transform: rotate(90deg); } .posabssemitransparentblack { position:absolute; left: 0px; top: 50px; width: 100px; height: 100px; background: lime; opacity: 0.1; } </style> </head> <body> <div class="posabssemitransparentblack"></div> <div class="wackeddiv"></div> </body> </html>