<!DOCTYPE HTML> <html> <body style="background:rgb(0,0,0);"> <div style="position:fixed;left:0;top:0;width:200px;height:300px;background:rgba(255,255,255,0.5);"> <div style="margin-top:200px;height:100px;background:rgb(0,0,0);"></div> </div> </body> </html>