网站给顶部添加个彩色滚动条

将下方HTML和CSS代码复制，放置网站公共底部即可。

HTML部分

<div class="gundongtiao"></div>

css部分

/*顶部彩色长条*/
.gundongtiao{
    animation: gundongtiao 1s infinite linear;
    height:3px;
    top:0;
    left:0;
    position: fixed;
    width:100%;
    z-index:9999;
}
@keyframes gundongtiao{
        0%{
            background: #000 linear-gradient(to left, #4cd964, #5ac8fa, #007aff, #34aadc, #5856d6, #ff2d55);
        }
        20%{
            background: #000 linear-gradient(to left, #ff2d55,#4cd964, #5ac8fa, #007aff, #34aadc,#5856d6);
        }
        40%{
            background: #000 linear-gradient(to left, #5856d6,#ff2d55,#4cd964, #5ac8fa, #007aff, #34aadc);
        }
        60%{
            background: #000 linear-gradient(to left, #34aadc,#5856d6,#ff2d55,#4cd964, #5ac8fa, #007aff);
        }
        80%{
            background: #000 linear-gradient(to left, #007aff,#34aadc,#5856d6,#ff2d55,#4cd964, #5ac8fa);
        }
        100%{
            background: #000 linear-gradient(to left, #5ac8fa,#007aff,#34aadc,#5856d6,#ff2d55,#4cd964);
        }
}