CSS
html, body {
height: 100%;
width: 100%;
display: flex;
justify-content: center;
align-items: center;
background: #e67e22;
}
.square {
background: white;
width: 30px;
height: 30px;
float: left;
top: -10px;
margin-right: 5px;
margin-top: 5px;
position: relative;
opacity: 0;
animation: enter 6s infinite;
}
.enter {
top: 0px;
opacity: 1;
}
.square:nth-child(1) { animation-delay: 1.8s; }
.square:nth-child(2) { animation-delay: 2.1s; }
.square:nth-child(3) { animation-delay: 2.4s; }
.square:nth-child(4) { animation-delay: 0.9s; }
.square:nth-child(5) { animation-delay: 1.2s; }
.square:nth-child(6) { animation-delay: 1.5s; }
.square:nth-child(8) { animation-delay: 0.3s; }
.square:nth-child(9) { animation-delay: 0.6s; }
.clear { clear: both; }
.last { margin-right: 0; }
@keyframes enter {
0% {
opacity: 0;
top: -10px;
}
5% {
opacity: 1;
top: 0px;
}
50.9% {
opacity: 1;
top: 0px;
}
55.9% {
opacity: 0;
top: 10px;
}
}
