| <!doctype html><html><meta charset=utf-8> |
| <meta name = "viewport" content = "width = device-width, user-scalable = no"> |
| <style> |
| body { |
| width: 300px; |
| } |
| div.o { |
| height: 50px; |
| width: 50px; |
| border-radius: 50px; |
| position: absolute; |
| left: 150px; top: 50px; |
| background: red; |
| -webkit-transform-origin: 25px 100px; |
| } |
| div.b { |
| position: relative; |
| } |
| .b div { |
| position: absolute; |
| height: 25px; |
| width: 25px; |
| border-radius: 25px; |
| } |
| </style> |
| <body> |
| <div class=b></div> |
| <div class=o></div> |
| <script> |
| var count=0; |
| function rnd(x) { |
| count++; |
| return Math.floor(Math.abs(Math.cos(count)) * x); |
| } |
| function newdiv() { |
| var d = document.createElement('div'); |
| d.style.top = rnd(350) + 'px'; |
| d.style.left = rnd(275) + 'px'; |
| d.style.background = 'rgb(' + rnd(255) + ',' + rnd(255) + ',' + rnd(255) + ')'; |
| document.querySelector('.b').appendChild(d); |
| } |
| for (var i = 0; i < 1000; i++) { |
| newdiv(); |
| } |
| |
| a = 0; |
| n = 0; |
| d = document.querySelector('.o'); |
| function update(a) { |
| d.style.webkitTransform = 'rotate3d(0,0,1,' + a + 'deg)'; |
| } |
| function step() { |
| a = (a + 3) % 360; |
| update(a); |
| window.requestAnimationFrame(step); |
| if (a == 0) { |
| n++; |
| history.pushState(n, n, '/pushstate/' + n); |
| } |
| } |
| step(); |
| </script> |
| |
| <body> |
| </html> |
