<!DOCTYPE html>
<html lang="en">
<head>
<style>
.box {
position: absolute;
height: 50px;
width: 100px;
left: 20px;
background-color: green;
outline: 4px solid black;
filter: blur(0);
}
.indicator {
top: 50px;
background-color: red;
}
</style>
</head>
<body>
<!-- You should see two green rectangles with black outlines, and no red. -->
<div class="indicator box"></div>
<div class="box">
<div class="box" style="top: 50px; left: 0"></div>
</div>
</body>
</html>