.MainSpinner {
    display: none;
    width: 160px;
    height: 160px;    
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;   
    z-index: 9999;    
}

.spinnerClass {
    width: 160px;
    height: 160px;
    border-radius: 50%;
}