```
<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<meta http-equiv="X-UA-Compatible" content="ie=edge">
<title>Document</title>
<style>
.parent {
width: 300px;
height: 300px;
background: url('images/timg.jpg') no-repeat center center;
background-size: cover;
border: 1px solid #333;
position: relative;
overflow: hidden;
}
.cover {
position: absolute;
width: 100%;
height: 100%;
right:-100%;
bottom: 0;
background: rgba(209, 123, 123, .5);
transition: all 1s;
transform-origin: left bottom;
}
.parent:hover .cover{
transform: rotate(-90deg)
}
</style>
</head>
<body>
<div class="parent">
<div class="cover">
</div>
</div>
</body>
</html>
```
