#hearts {
    position: relative;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 99;
}
.heart-container {
    float: left;
    position: fixed;
    bottom: -20px;
    left: -20px;
    -moz-animation-duration: 10s;
    -moz-animation-name: fall;
    -moz-animation-timing-function: linear;
    -webkit-animation-duration: 10s;
    -webkit-animation-name: fall;
    -webkit-animation-timing-function: linear;
}
@-moz-keyframes fall {
    from {
        bottom: -20px;
    }
    to {
        bottom: 100%;
    }
}
@-webkit-keyframes fall {
    from {
        bottom: -10%;
    }
    to {
        bottom: 100%;
    }
}
.heart {
    overflow: hidden;
    height: auto;
    width: auto;
    font-size: 1rem;
    text-align: center;
    color: red;
    -moz-animation-duration: 0.8s;
    -moz-animation-timing-function: ease-in-out;
    -moz-animation-iteration-count: infinite;
    -moz-animation-direction: alternate;
    -moz-transform-origin: center center;
    -webkit-animation-duration: 0.8s;
    -webkit-animation-timing-function: ease-in-out;
    -webkit-animation-iteration-count: infinite;
    -webkit-animation-direction: alternate;
    -webkit-transform-origin: center center;
}