html, body {
  overflow: hidden;
  width: 100%;
  height: 100%;
  margin: 0;
  padding: 0;
  /*background: repeating-radial-gradient(#ffffff,#000000);*/
}

.canvas {
  position: absolute;
  margin: 0;
  padding: 0;
  /*top: -60vh;
  left: -10vw;
  width: 120vw;
  height: 220vh;*/
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  transform-origin: 50% 50%;
  animation-timing-function: linear;
  animation-iteration-count: infinite;
  animation-duration: 300s;
}

.canvas:nth-child(2) {
  animation-name: ani;
  opacity: 0.95;
}

@keyframes ani {
  0%   { transform: rotate(0deg) scale(1.0); }
  25%  { transform: rotate(90deg) scale(5.0); }
  50%  { transform: rotate(180deg) scale(1.0); }
  75%  { transform: rotate(270deg) scale(5.0); }
  100%  { transform: rotate(360deg) scale(1.0); }
}