*,
*::after,
*::before {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  height: 100vh;
  display: flex;
  justify-content: center;
  align-items: center;
  background-color: #000;
}

svg {
  overflow: hidden;
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

polygon {
  fill: none;
  stroke: lime;
  stroke-width: 16;
  transform-origin: center center;
  animation: move 10s linear infinite;
  animation-delay: calc(var(--i) * -.5s);
}

@keyframes move {
  0% {
    transform: scale(0) rotate(0);
    opacity: 1;
  }
  100% {
    transform: scale(3) rotate(45deg);
    opacity: 0;
  }
}