I am trying to make like this figure.

But I don’t understand how to overlay these figures in upward direction. Here’s the figure that I had done in this to make it.

And here’s my code:
<div class="cir a"></div>
<div class="cir b"></div>
<div class="cir c"></div>
<style>
body{
background:#0B2429;
}
.cir{
width:119px;
height:120px;
background:#F7EC7D;
}
.a{
position:relative;
margin-top:9.35rem;
margin-left:4.5rem;
background:#F3AC3C;
border-top-left-radius:50%;
border-bottom-left-radius:50%;
border-bottom-right-radius:50%;
}
.b{
position:relative;
margin-left:auto;
margin-right:auto;
margin-top:-11.3rem;
background:#998235;
border-top-left-radius:50%;
border-bottom-left-radius:50%;
border-bottom-right-radius:50%;
}
.c{
margin-top:-11.2rem;
margin-left:12.1rem;
background:#F3AC3C;
border-radius:50%;
}
</style>
How to solve this ?