<svg xmlns="http://www.w3.org/2000/svg" id="flag-icon-css-pl" viewBox="0 0 512 512">
  <g fill-rule="evenodd">
    <path fill="#fff" d="M512 512H0V0h512z"/>
    <path fill="#dc143c" d="M512 512H0V256h512z"/>
  </g>
</svg>