body {
    
    color: black;-
    font-family: "Arial";
    font-size:20px;
    text-align:left; 
    
   background-image:url(images/flow.gif); 
    repeat-y 100% 100% fixed;
    height:100%;
    width:100%;
}

h1 {
    
    color: black;
    font-family: "Arial";
    font-size:50px;
    text-align:left;
        
}

h2 {
    
    color:darkgrey;
    font-family: "Arial";
    font-size:25px;
    text-align:left;
}

h3 {
    
    text-align: center;
}

ul {
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: #333;
}

li {
    float: left;
}

li a {
    display: block;
    color: white;
    text-align: center;
    padding: 14px 16px;
    text-decoration: none;
}

li a:hover {
    background-color: #111;
}