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<!DOCTYPE html> <html> <head> <style> #myDIV { background-color: lightblue; animation: mymove 5s infinite; } @keyframes mymove { 50% {margin: 50px;} } </style> </head> <body> <h1>Animation of margin</h1> <p>Gradually change the margin from 0px to 50px, and back to 0px:<p> <div id="myDIV"> This is my DIV element. </div> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/edibu.js"></script> <script src="https://www.comfortsoftwaregroup.com/web/webmastertoolbag/tongji.js"></script></body> </html>