@keyframes animatedBackground {
  from { background-position: 0 0; }
  to { background-position: 100% 0; }
}
.area {
  background-color: #8ac8d5;
  background-image:
  radial-gradient(rgba(76,139,152,1), rgba(138,201,214,.05) 200px, transparent 400px),
  radial-gradient(rgba(76,139,152,1), rgba(255,255,255,.1) 300px, transparent 400px),
  radial-gradient(rgba(76,139,152,1), rgba(138,201,214,.1) 400px, transparent 400px);
  background-size: 1000px 500px, 700px 500px, 700px 500px; 
  background-position: 0 -200px, 300px -100px, 700px -200px;
  min-height: 100%;
 animation: animatedBackground 40s linear infinite;
}