怎么让背景的url跟着我设定的路线走

鱼的生成方式是在div的background里面，代码是网上找的：
#fish{
width: 174px;
height: 126px;
position: absolute;
left:0;
top:0;
background:url(image/fish8.png) no-repeat left top;
animation:active1 0.8s steps(8) infinite;

@keyframes active1 {
0%{

        }
        100%{
            background-position: left -1008px;
        }
    }

现在鱼相当于一个背景，但我想让鱼跟我设定的路径x，y坐标来走，应该怎么实现

 <!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
    <title> 页面名称 </title>
<style type="text/css">
#fish{
    width: 300px;
    height: 300px;
    position: absolute;
    left:0;
    top:0;
    background: url("https://avatar.csdn.net/5/6/7/3_jslang.jpg") no-repeat left top;
}
</style>
</head>
<body>
<div id="fish"></div>
<script type="text/javascript">
var x = 0, y = 0;
function move() {
    x++;
    y++;
    document.getElementById("fish").style.backgroundPosition = x+"px "+y+"px";
    if (x<280)
        setTimeout(move,10);
}
move();
</script>
</body>
</html>

https://download.csdn.net/download/qq_34697613/9523003

#fish{
    width: 174px;
    height: 126px;
    position: absolute;
    left:0;
    top:0;
    overflow: hidden;
}
#fish:before{
    content: "";
    width: 100px;
    height: 100px;
    position: absolute;
    left:0;
    top:0;
    background: url(image/fish8.png) no-repeat left top;
    animation:active1 0.8s steps(8) infinite;
}

@keyframes active1 {
    0%{ top: 0px; }
    100%{ top: 100px; }
}

#fish:before{
content: "";
width: 100px;
height: 100px;
position: absolute;
left:0;
top:0;
background: url(image/fish8.png) no-repeat left top;
animation:active1 0.8s steps(8) infinite;
}

是这样吗？

<!doctype html>
<html lang="en">
<head>
    <meta charset="UTF-8" />
    <meta http-equiv="X-UA-Compatible" content="IE=edge,chrome=1" />
    <title> 页面名称 </title>
<style type="text/css">
#fish{
    width: 300px;
    height: 300px;
    position: absolute;
    left:0;
    top:0;
    overflow: hidden;
}
#fish:before{
    content: "";
    width: 100px;
    height: 100px;
    position: absolute;
    left:0;
    top:0;
    background: url("https://avatar.csdn.net/5/6/7/3_jslang.jpg") no-repeat left top;
    animation:active1 0.8s steps(8) infinite;
}

@keyframes active1 {
    0%{ left: 0px; top: 0px; }
    100%{ left: 100px; top: 200px; }
}
</style>
</head>
<body>
<div id="fish"></div>
</body>
</html>

我有一个思路而已,毕竟我没学过这些
像地图在移动一样让角色在地图的中间