body {background-color:#fffacd;}
h1 {font-size:200%; text-align: center;}
h2 {font-size:120%; text-align: center;}

ul{margin-left: 55.5em;}
li {list-style-image: url("image/demo1.png") ;}
li:hover {list-style-image: url("image/demo2.png") ;}
li:active {list-style-image: url("image/demo3.png") ;}

 div.button {
    	text-align:center;
      padding: 20px;
      text-decoration: none;
      color: blue;
      }

.btn{width:200px;
     padding: 10px;
     color:blue ;
     background: #add8e6 ;
     border-radius: 5px;
}

table{margin:auto;}
.start{text-align:center;}