body {
  width: 99vw;
  background-size: 2000px;
  height: 300%;
  background-image: url('https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcSqZ2oVJg_TgOkGk5up_4DjfZnLEoQI8mudew&s');
  background-size: cover;
  background-attachment: fixed;
  background-repeat: no-repeat;
  

}
.see {
        background-color: rgba(100, 100, 100, 0.3); 
        color: white; 
        padding: 10px;
        text-align: center;
    }
.cen{
    text-align: center;
    display: block; 
    margin-left: auto;
    margin-right: auto;
}