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<!DOCTYPE html> <html> <head> <style> #myDIV { width: 300px; height: 200px; background-color: lightgreen; border-block-end-style: solid; border-block-width: 10px; animation: mymove 5s infinite; } @keyframes mymove { 50% {border-block-end-color: pink;} } </style> <script async src="https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client=ca-pub-4638549725433695" crossorigin="anonymous"></script><script src="//www.p2hp.com/tj.js"></script></head> <body> <h1>Animation of border-block-end-color</h1> <p>Gradually change the border-block-end-color property from black to pink, then back:<p> <div id="myDIV"></div> </body> </html>
