<div class="g t l"></div>
<div class="y t r"></div>
<div class="y b l"></div>
<div class="g b r"></div>
<style>
body {
background: #998235;
}
div {
position: absolute;
}
.g {
width: 80px;
height: 100px;
background: #1A4341;
}
.y {
width: 80px;
height: 60px;
background: #F3AC3C;
}
.t {
top: 60;
}
.b {
bottom: 60;
}
.l {
left: 110;
border-radius: 0 50px;
}
.r {
right: 110;
border-radius: 50px 0;
}
</style>