写段脚本刷页面

页面地址： http://www.webhek.com/color-test

代码：

     document.getElementsByClassName("play-btn")[0].onclick = function () {
            setInterval(function () {
                var span = document.getElementById("box").children;
                var spanLen = span.length;
                for (var i = 0; i < spanLen; i++) {
                    var n1 = (i + 1) % spanLen;
                    var n2 = (i + 2) % spanLen;
                    var color = span[i].style.backgroundColor;
                    var n1color = span[n1].style.backgroundColor;
                    var n2color = span[n2].style.backgroundColor;
                    if (color != n1color && color != n2color) {
                        span[i].click();
                        break;
                    }
                }
            }, 10);
        }