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編輯您的代碼：
<!DOCTYPE html> <html> <head> <style> div { width:100px; height:100px; background:red; animation:myfirst 5s; -moz-animation:myfirst 5s; /* Firefox */ -webkit-animation:myfirst 5s; /* Safari and Chrome */ -o-animation:myfirst 5s; /* Opera */ } @keyframes myfirst { 0% {background:red;} 25% {background:yellow;} 50% {background:blue;} 100% {background:green;} } @-moz-keyframes myfirst /* Firefox */ { 0% {background:red;} 25% {background:yellow;} 50% {background:blue;} 100% {background:green;} } @-webkit-keyframes myfirst /* Safari and Chrome */ { 0% {background:red;} 25% {background:yellow;} 50% {background:blue;} 100% {background:green;} } @-o-keyframes myfirst /* Opera */ { 0% {background:red;} 25% {background:yellow;} 50% {background:blue;} 100% {background:green;} } </style> </head> <body> <div></div> <p><b>注釋?zhuān)?/b>當(dāng)動(dòng)畫(huà)完成時(shí)，會(huì)變回初始的樣式。</p> <p><b>注釋?zhuān)?/b>本例在 Internet Explorer 中無(wú)效。</p> </body> </html>
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