<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <style> </style> </head> <body> <canvas id="canvas" width="500" height="500">你的浏览器不支持canvas技术</canvas> <script> var c=document.getElementById('canvas'); var ctx= c.getContext('2d'); ctx.translate(c.width/2, c.height/2); //首先绘制8个静态环绕的圆形 function create() { for (var i = 1; i < 9; i++) { if (i==1) { ctx.beginPath(); ctx.arc(0, -30, 5, 0, 2 * Math.PI); ctx.fillStyle='#f0f'; ctx.fill(); }else{ ctx.beginPath(); ctx.arc(0, -30, 5, 0, 2 * Math.PI); ctx.strokeStyle ='#000'; ctx.stroke(); } ctx.rotate(Math.PI * 45 / 180); } } //定时转动 setInterval(function(){ ctx.clearRect(-c.width/2,-c.height, c.width, c.height); create(); ctx.rotate(Math.PI*45/180); },300); //定时关闭加载 setTimeout(function(){ c.style.display='none'; },12200); // </script> </body> </html>