<!doctype html>
<html>
<head>
<meta charset="utf-8">
<title>無標題文檔</title>
<!--腳本加載-->
<script src="
<script type="text/javascript">
$(document).ready(function(e) {
var a = 200, b = 200, r = 90, times = 0;
setInterval(function flutter() {
times += 0.1;
var hudu = (2*Math.PI / 360) * 6 * times;
var X = a + Math.sin(hudu) * r;
var Y = b - Math.cos(hudu) * r // 注意此處是“-”號，因為我們要得到的Y是相對于（0,0）而言的。
//$(".sky_text").css({"left":X+"px","top":Y+"px"});
$("body").append('<div style="position:absolute; left:'+X+'px; top:'+Y+'px; width:1px; height:1px; background:#00F;"></div>');
if(times == 60){
return;
}
}, 2);
});
</script>
<style type="text/css">
body,html{ padding:0; margin:0;}
</style>
</head>
<body>
<div style="position:absolute; left:198px; top:198px; width:4px; height:4px; background:#F00;"></div>
</body>
</html>
