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<!DOCTYPE html>
<html>
<head>
<style> 
#myDIV {
  border: 1px solid black;
  width: 300px;
  color: red;
  animation: mymove 5s infinite;
}
@keyframes mymove {
  50% {color: blue;}
}
</style>
</head>
<body>
<h1>Animation of color</h1>
<p>Gradually change the color of the text from red to blue, then back:<p>
<div id="myDIV">
  <h1>This is a header</h1>
  <p>This is a paragraph</p>
</div>
</body>
</html>