Without further ado, let’s get right to the code.

# # HTML code

<div class="back"></div>
<div class="heart"></div>
Copy the code

# # the CSS code

<style> .back { position: fixed; padding: 0; margin: 0; top: 0; left: 0; width: 100%; height: 100%; background: white; animation-name: backdiv; animation-duration: 1s; animation-iteration-count: infinite; } .heart { position: absolute; margin: auto; top: 0; right: 0; bottom: 0; left: 0; background-color: pink; height: 50px; width: 50px; transform: rotate(-45deg); animation-name: beat; animation-duration: 1s; animation-iteration-count: infinite; } .heart:after { background-color: pink; content: ""; border-radius: 50%; position: absolute; width: 50px; height: 50px; top: 0px; left: 25px; } .heart:before { background-color: pink; content: ""; border-radius: 50%; position: absolute; width: 50px; height: 50px; top: -25px; left: 0px; } @keyframes backdiv { 50% { background: #ffe6f2; } } @keyframes beat { 0% { transform: scale(1) rotate(-45deg); Transform: scale(0.6) rotate(-45deg); } } </style>Copy the code

The effect picture is as follows: