head {
                margin:10px
                padding:10px
                width: 100%;
	    	height: 100%;
          }
           body {
	    	margin: 0px;
	    	padding: 0px;
	    	width: 100%;
	    	height: 100%;
                text-align: center	    	
	    }
	    body {
	    	background: #E9E9E9;
	    	
	    	font-size: 2em;
	    }	    
	    pre {
	    	text-align: left;
	    }
	    
            
            #crono{
                position: relative;
	        margin: auto;
   	
	        background-repeat: no-repeat;
	        height: 290px;
	        width: 350px;
	        
            }