/*Spinner 1*/
.spinner-1:before {
    content: "";
    box-sizing: border-box;
    position: absolute;
    top: 50%;
    left: 50%;
    height: 60px;
    width: 60px;
    margin-top: -30px;
    margin-left: -30px;
    border-radius: 50%;
    border: 3px solid lightgray;
    border-top-color: blue;
    animation: spinner 0.7s linear infinite;
}

/*Spinner 2*/
.spinner-2:before {
    content: "";
    box-sizing: border-box;
    position: absolute;
    top: 50%;
    left: 50%;
    height: 60px;
    width: 60px;
    margin-top: -30px;
    margin-left: -30px;
    border-radius: 50%;
    border: 2px solid transparent;
    border-top-color: blue;
    border-bottom-color:blue;
    animation: spinner 0.7s ease infinite;
}

/*Spinner 3*/
.spinner-3:before {
    content: "";
    box-sizing: border-box;
    position: absolute;
    top: 50%;
    left: 50%;
    height: 60px;
    width: 60px;
    margin-top: -30px;
    margin-left: -30px;
    border-radius: 50%;
    border-top: 2px solid blue;
    border-right:2px solid transparent;
    animation: spinner 0.7s linear infinite;
}

@keyframes spinner {
    to {
        transform: rotate(360deg);
    }
}