<!DOCTYPE?html>
<html>
<head>
<meta?charset="UTF-8">
<title></title>
<style>
.a{
list-style:?none;
width:?423.2px;
height:?423.2px;
position:?relative;
left:?400px;
top:?100px;
transition:?all?5s?ease-in;
padding:?0px;?
margin:?0px;
background-color:?#00FFDE;
}
.a:hover{
transform:?rotate(1440deg);
}
li{
width:?200px;
height:?200px;
border:?1px?solid?black;
}
.a1{
border-radius:?0px?150px;
position:?absolute;
left:?0px;
top:?0px;
}
.a2{
border-radius:?150px?0px;
position:?absolute;
left:?220px;
top:?0px;
}
.a3{
border-radius:?150px?0px;
position:?absolute;
left:?0px;
top:?220px;
}
.a4{
border-radius:?0px?150px;
position:?absolute;
left:?220px;
top:?220px;
}
</style>
</head>
<body>
<ul?class="a">
<li?class="a1"></li>
<li?class="a2"></li>
<li?class="a3"></li>
<li?class="a4"></li>
</ul>
</body>
</html>
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