html：
<body>
<div id="box">
<div id="div1"></div>
</div>
</body>
<style>
@keyframes test {
from{
left:0
}
to{
left:-100%;
}
}
#box{
width:400px;
height:50px;
margin: 50px auto;
position: relative;
border: 1px solid #000;
overflow: hidden;
}
#div1{
width:200%;
height:100%;
position: absolute;
left:0;
top:0;
background: -webkit-repeating-linear-gradient(-45deg, red 0px,red 10px,blue 10px,blue 20px);
animation:4s test linear infinite;
}
</style>
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