body{
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.loader{
    height: 200px;
    width: 200px;
    border-radius: 100%;
    border: 12px solid #e3e3e3;
    border-right-color:#4070f4 ;
    animation: spin 1s ease infinite;
}
@keyframes spin {
    100% {
         transform: rotate(360deg);
    }
}