Breathe Sleep Aid CSS Animation

breathe.html

<title>Breathe</title>

<style>

@keyframes breathe {
  from { background-color: black; }
  to   { background-color: red; }
}

body {
  animation-duration: 6s;
  animation-name: breathe;
  animation-iteration-count: infinite;
  animation-direction: alternate;
  animation-timing-function: ease-in-out;
}

</style>

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