<p>
<style>
* {
margin: 0;
}
html {
background: #293462;
}
body {
height: 100%;
background: #FFF1C1;
clip-path: circle(100px at 200px 150px);
}
p {
position: fixed;
left: 79px;
top: 200px;
transform: rotate(45deg);
width: 101px;
height: 101px;
background: #FE5F55;
box-shadow: 45px -114px 0 15px #FE5F55;
}
</style>
