JSFiddle - React, Tailwind, and code Playground

by josangel555

HTML

<div class="b1"></div>

CSS

div{
    border-radius: 0px 0px 90px 0px /0px 0px 100px 0px;
    border: 1px solid red;
    border-left: 0px;
    border-top: 0px;
    height: 300px;
    width: 300px;
    transform: rotate(30deg);
    position: fixed;
    top: -200px;
    left: 60px;
}