MINI

C:/xampp/htdocs/ecertificate/theme/templates/plugins/flag-icon-css/flags/4x3/

files >> C:/xampp/htdocs/ecertificate/theme/templates/plugins/flag-icon-css/flags/4x3/lu.svg

 <svg xmlns="http://www.w3.org/2000/svg" id="flag-icon-css-lu" viewBox="0 0 640 480">
  <path fill="#00a1de" d="M0 240h640v240H0z"/>
  <path fill="#ed2939" d="M0 0h640v240H0z"/>
  <path fill="#fff" d="M0 160h640v160H0z"/>
</svg>