變換色彩的旋轉圖形----背景效果

html代碼：javascript <canvas id = 'canv'></canvas> css代碼：css body{ width:100%; overflow:hidden; margin:0; } js代碼：html var c = document.getElementById('canv'), $ = c.getContext('2d'), w = c.width = wi

>>阅读原文<<