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<html><head><style> #myDIV { width: 300px; height: 200px; border: 1px solid black; animation: mymove 5s infinite;}@keyframes mymove { 50% {border-right: 15px solid lightblue;}}</style></head><body><h1>Animation of border-right</h1><p>Gradually change the border-right property:<p><div id="myDIV"></div><p>The border-right is a shorthand property for all border-right properties.</p><p>See individual border-right properties to see which is <em>animatable</em>.</p></body></html>