// https://codepen.io/dodozhang21/pen/siKtp
@include keyframes(bounce) {
    0%, 20%, 50%, 80%, 100% {
        @include transform(translateY(0));
    }
    40% {
        @include transform(translateY(-30px));
    }
    60% {
        @include transform(translateY(-15px));
    }
}


.bounce {
    @include animation(bounce 2s infinite);
}