<html>
<head>
<style>
.ex1 {
border: 2px solid #00ab55;
padding: 10px;
border-top-left-radius: 25px;
}
.ex2 {
border: 2px solid #ff4842;
padding: 10px;
border-top-left-radius: 50px 50px;
}
</style>
</head>
<body>
<h1>The border-top-left-radius property</h1>
<div class="ex1">border-top-left-radius: 25px</div><br>
<div class="ex2">border-top-left-radius: 50px 50px</div>
</body>
</html>