body, html {
  margin: 0;
  padding: 0;
  width: 100%;
  height: 100%;
  overflow: hidden;
  background-color: #222;
}

#animationContainer {
  position: relative;
  width: 100%;
  height: 100%;
}

.circle {
  position: absolute;
  border-radius: 50%;
  opacity: 0.8;
}