cssbattle91.css

<div></div>
<style>
 body {
   background: linear-gradient(180deg, #D25B70 50%, #6CB3A9 50%)
 }
  div {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    margin: 50px auto;
    background: #F6DF96;
    &:after {
        content: '';
        background: linear-gradient(180deg, #6CB3A9 15px, transparent 15px) repeat-y;
        width: 100%;
        position: absolute;
        background-size: 100% 25px;
        top: 50%;
        left: 0;
        height: 50%;
    }
  }
</style>