具体效果查看本博客。。。
可自动更改显示的内容。。。
代码：
添加到博客主题的 footer.php 文件中

<!– 页脚 –>
<footer>
<div class="site-footer">
<div style="color: rgb(137, 137, 140);font-size:0.9em;" class="footer-container rm-link-color">
<p>
<!– 加载时间 –>
<script>
var start_time = new Date();
var end_time = "";
var loadt = setInterval(function () {
if (document.readyState == "complete") {
showLoadTime();
}
}, 500)

                function showLoadTime() {
                    end_time = new Date();
                    loadtime_span.innerHTML = "T " + (end_time.getTime() - start_time.getTime()) + " ms";
                    clearInterval(loadt);
                }
            </script>
            <!-- IP -->
            <span id="ip_span" align=center></span>
            <script type="text/javascript">;
                    function handleIpCallback(res) {
                    returnCitySN = res
                    ip_span.innerHTML = (returnCitySN["city"] || returnCitySN["province"]) + returnCitySN["isp"] + " " + returnCitySN["ip"];
                }
                </script>
                <script type="text/javascript" src="https://ip.useragentinfo.com/jsonp?callback=handleIpCallback"></script>

            <span class="mx-2">|</span>

            <span id="loadtime_span"></span>

        <!-- 声明 -->
       <div class="row">
                <div class="col-sm-12">
                    <span> Copyright &copy; <?php echo date("Y"); ?> <a href="<?php $this->options->siteUrl(); ?>" target="_blank"><?php $this->options->title(); ?></a></span><br />
                    <span>Powered by <a rel="noopener" href="https://typecho.org/" target="_blank">Typecho</a> | Theme by <a rel="noopener" href="https://github.com/dingzd1995/typecho-theme-waxy" target="_blank">Waxy</a><?php add_ICP($this); ?>
<p></span><br />
                </div>
            </div>
    </div>
</div>
<div id="flyfish" class="fly-fish" height="200"></div>

</footer>

<script src="https://ooolo.net/usr/themes/waxy/js/fish.js"></script>

css：

    .site-footer {
    margin:0;
    /margin-top:64px;/
    padding-top:30px;
    padding-bottom:30px;
    color:hsla(0,0%,100%,.9);
    box-sizing:inherit;
    text-align:center;
    font-size:1em
    }
    @media (max-width:991px){
    .site-footer {
    padding-top:0px;
    }
    }
    .site-footer p {
    margin:0
    }
    .rm-link-color > p > a {
    text-decoration:none;
    color:#89898c
    }
    .rm-link-color > p > a:hover {
    text-decoration:underline
    }

    .fly-fish{
    z-index: -1;
    line-height: 0px;
    height: 350px;
    }
    footer{
    position: relative;
    }
    .site-footer{
    position: absolute;
    width: 100%;
    top: calc(100% / 4 * 3);
    transform: translateY(calc(-50% + 10%));
    padding: 0;
    }

    .App{
    padding-bottom: 0;
    }
    @media (max-width: 767px){
    .App{
    padding-bottom: 0;
    }
    .App-content {
    padding-bottom: 0;
    }
    }