how to apply animations in css code example

Example 1: css animation

<style>
.my-element {
  width: 100%;
  height: 100%;
  animation: tween-color 5s infinite;
}

@keyframes tween-color {
  0% {
    background-color: red;
  }
  50% {
    background-color: green;
  }
  100% {
    background-color: red;
  }
}

html,
body {
  height: 100%;
}
<style>

<body>
	<div class="my-element"></div>
</body>

Example 2: css animation

<!DOCTYPE html>
<html lang="en">
   <head>
      <title>CSS Animation</title>

      <style>
         .element {
            height: 250px;
            width: 250px;
            margin: 0 auto;
            background-color: red;
            animation-name: stretch;
            animation-duration: 1.5s;
            animation-timing-function: ease-out;
            animation-delay: 0;
            animation-direction: alternate;
            animation-iteration-count: infinite;
            animation-fill-mode: none;
            animation-play-state: running;
         }

         @keyframes stretch {
            0% {
               transform: scale(0.3);
               background-color: red;
               border-radius: 100%;
            }
            50% {
               background-color: orange;
            }
            100% {
               transform: scale(1.5);
               background-color: yellow;
            }
         }

         body,
         html {
            height: 100%;
         }

         body {
            display: flex;
            align-items: center;
            justify-content: center;
         }
      </style>
   </head>
   <body>
      <div class="element"></div>
   </body>
</html>

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