* {
  margin: 0;
  padding: 0;
}
body {
  overflow: hidden;
  background: #000;
  height: 100vh;
}
.logo {
  font-family: "Montserrat", sans-serif;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  color: #fff;
  font-size: 50px;
}
span {
  height: 50px;
  width: 50px;
  border-radius: 50px;
  position: absolute;
  pointer-events: none;
  background: #55b9f3;
  box-shadow: 20px 20px 60px #489dcf,
    -20px -20px 60px #62d5ff;
  transform: translate(-50%, -50%);
  animation: blow 4s linear infinite;
}
@keyframes blow {
  0% {
    transform: translate(-50%, -50%);
    opacity: 1;
    filter: hue-rotate(0deg);
  }
  100% {
    transform: translate(-50%, -1000%);
    opacity: 0;
    filter: hue-rotate(720deg);
  }
}