<html>
 <head>
  <style>
    body{
     background-color:grey;
    }
	
    .letter {
     content:"";
     display:block;
     position:absolute;
     left:50px;
     top:50px;
     width:0;
     height:0;
     border-width:50px 100px 50px 100px;
     border-style:solid;
     border-color: cornsilk white white white ;
     margin:5px;
     border-radius:5px;
     box-shadow: 5px 5px 5px black;
    }
     
    .letter:before {
     content:"";
     display:block;
     position:absolute;
     bottom:-30px;
     left:-100px;
     top:-150px;
     width:0;
     height:0;
     border-width:50px 100px 50px 100px;
     border-style:solid;
     border-color: transparent transparent white transparent ;
     border-radius:4px;
    }
   </style>
  </head>
    <body>
     <center>
       <div class="letter">
       </div>
     </center>
    </body>
</html>