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<!DOCTYPE html> <html> <body> <p>In this example, the setInterval() method executes the setColor() function once every 300 milliseconds, which will toggle between two background colors.</p> <button onclick="stopColor()">Stop Toggling</button> <script> var myVar = setInterval(function(){ setColor() }, 300); function setColor() { var x = document.body; x.style.backgroundColor = x.style.backgroundColor == "yellow" ? "pink" : "yellow"; } function stopColor() { clearInterval(myVar); } </script> </body> </html>