h1{
    text-align: center;
    font-family:arial;
    

}
header{
    top:100px;
    width: 1000px;
    height:150px;
    padding:50px;
    background-color: rgb(194, 178, 128) ;
    margin:auto;
    position:relative;
    
}
a{
    position:absolute;
    top:-50px;
    left:-50px; 
    width:200px; 
    height:200px; 
     border-radius: 50%;
     text-align:center;
     line-height:200px;
     background-color:aqua;
   


}