<div class="con lgt">
<div class="d1 drk">
<div class="d2 lgt">
<div class="d3 drk">
<div class="d4 lgt">
<div class="d5 drk">
<div class="d6 lgt">
<div class="d7 drk"></div>
</div>
</div>
</div>
</div>
</div>
</div>
</div>
<style>
body {
width: 100%;
height: 100%;
margin: 0;
display: grid;
place-content: center;
background: #588A95;
}
.con {
width: 11.25rem;
height: 11.25rem;
background: #dd6b4d;
}
.lgt {background: #ffffff}
.drk {background: #588A95}
div {
display: flex;
justify-content: end;
align-items: end;
}
.d1 {height: 9.75rem; width: 9.75rem;}
.d2 {height: 8.25rem; width: 8.25rem;}
.d3 {height: 6.75rem; width: 6.75rem;}
.d4 {height: 5.25rem; width: 5.25rem;}
.d5 {height: 3.75rem; width: 3.75rem;}
.d6 {height: 2.25rem; width: 2.25rem;}
.d7 {height: 0.75rem; width: 0.75rem;}
</style>