app/assets/images/flags/1x1/jm.svg
<svg xmlns="http://www.w3.org/2000/svg" id="flag-icon-css-jm" viewBox="0 0 512 512">
<g fill-rule="evenodd">
<path d="M0 0l256 256L0 512zm512 0L256 256l256 256z"/>
<path fill="#090" d="M0 0l256 256L512 0zm0 512l256-256 256 256z"/>
<path fill="#fc0" d="M512 0h-47.7L0 464.3V512h47.7L512 47.7z"/>
<path fill="#fc0" d="M0 0v47.7L464.3 512H512v-47.7L47.7 0z"/>
</g>
</svg>