body{
    margin: 0;
    padding: 0;
    background-image: url("da.gif");
    background-repeat: no-repeat;
    background-size: 2000px 1000px;
}
ul{
    list-style-type: none;
    margin: 0;
    padding: 0;
    overflow: hidden;
    background-color: aquamarine;
}
ul li{
    float: left;
}
ul li a{
    display: block;
    color: black;
    text-align: center;
    padding: 14px  16px;
    text-decoration: none;
}
ul li a:hover{
    background-color: brown;
    color: black;
}
h1{
    color: red;
    text-align: center;
}
.one{
    margin-top: 200px;
    margin-left: 700px;
    width: 500px;
    height: 300px;
    padding: 10px;
    border-style: dotted;
    border-radius: 1px 3px 25px 25px;
    color: lightpink;
    border-color: lightsalmon;
    font-size: 20px;
    font-family: cursive;
    text-align: center;
    text-decoration: none;
    list-style-type: none;
    background-color: none;
    line-height: 50px;
}