<svg xmlns="http://www.w3.org/2000/svg" height="512" width="512" version="1">
  <defs>
    <clipPath id="a">
      <path fill-opacity=".67" d="M0 0h512v512H0z"/>
    </clipPath>
  </defs>
  <g fill-rule="evenodd" clip-path="url(#a)">
    <path fill="#fff" d="M661.1 512h-766.65V0H661.1z"/>
    <path fill="#df0000" d="M661.1 512h-766.65V256.45H661.1zM347.57 255.85a156.764 156.764 0 1 1-313.528 0"/>
    <path d="M347.57 255.75a156.764 156.764 0 1 1-313.528 0" fill="#fff"/>
  </g>
</svg>