GIF叫UI整不就完事了吗
可以用canvas画
你这直线的,canvas很简单啊。
给你写了个CSS的例子,结合animation特性使用:
(如果这个网页的代码消失了,自行替换下面源代码部分)效果图:(红色块围绕着黑色框边界运动)
```css
.bg{
width: 100%;
height: 300px;
border: 2px solid black;
}
.light {
width: 50px;
height: 10px;
background-color: red;
position: relative;
animation-name: example;
animation-duration: 5s;
animation-timing-function: linear;
animation-delay: 2s;
animation-iteration-count: infinite;
animation-direction: alternate;
}
@keyframes example {
0% {left:0px; top:0px;}
25% {left:calc(100% - 50px); top:0px;}
50% {left:calc(100% - 50px); top:290px;}
75% {left:0px; top:290px;}
100% {left:0px; top:0px;}
}
<div class="bg">
<div class="light"></div>
</div>
```