.container {
    width: 144px;
    height: 100px;
    position: relative;
    margin: 0 auto;
}
.container span {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    position: absolute;
    bottom: 0;
    left: 0;
    display: block;
    background-color: #9B5986;
     animation: Loading 3s infinite ease-in-out; 
}
.container span:nth-of-type(2) { left: 30px; animation-delay: .2s; }
.container span:nth-of-type(3) { left: 60px; animation-delay: .4s; }
.container span:nth-of-type(4) { left: 90px; animation-delay: .6s; }
.container span:last-of-type { left: 120px; animation-delay: .8s; }

@keyframes Loading {
    0% { height: 20px; transform: translateY(0); background-color: #9B59B6; }
    50% { height: 20px; transform: translateY(40px); background-color: #3498D6; }
    100% { height: 20px; transform: translateY(0); background-color: #9B59B6; }
}