.loading{
   border: 10px solid #f3f3f3;
   border-top: 10px solid #3498db;
   border-radius: 50%;
   width: 80px;
   height: 80px;
   animation: spin 1s linear infinite;
   /*margin-left: 10%;*/
   margin-top: 10%;
}

.loading2{
    border: 10px solid #f3f3f3;
    border-top: 10px solid #3498db;
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin-left: 45%;
    margin-top: 10%;
    margin-bottom: 10%;
 }
 .loading3{
    border: 10px solid #f3f3f3;
    border-top: 10px solid #3498db;
    border-radius: 50%;
    width: 30px;
    height: 30px;
    animation: spin 1s linear infinite;
 }

@keyframes spin {
    0%{
        transform: rotate(0deg);
    }
    100%{
        transform: rotate(360deg);
    }
}