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<!DOCTYPE html> <html> <head> <title>HTML5, CSS3 and JavaScript demo</title> </head> <body> <h3>Its a stopwatch widget!</h3> <div class="container"> <div class="bar"></div> </div> </body> </html>
body { background-color: #111; margin: 100px; } h3 { color: #fff; } .container { width: 150px; height: 150px; border: 3px solid #0af; position: relative; border-radius: 100px; } @keyframes progress-bar { 0% { transform: rotate(-90deg) translate(75px); } 100% { transform: rotate(270deg) translate(75px); } } .bar { position: absolute; width: 20px; height: 20px; left: 65px; top: 65px; border-radius: 20px; background-color: #0af; animation-name: progress-bar; animation-duration: 1s; animation-iteration-count: infinite; animation-timing-function: ease-out-in; }