<p a><p b><p c><p d>
<style>
* {
background: #1A4341;
margin: 0;
}
p {
float: left;
width: 50vw;
height: 50vh;
background: #F3AC3C;
}
[a] {
border-radius: 0 0 100px 0;
}
[b] {
border-radius: 0 0 0 100px;
}
[c] {
border-radius: 0 100px 0 0;
}
[d] {
border-radius: 100px 0 0 0;
}
</style>
