/* reference: https://en.wikipedia.org/wiki/Flag_of_Brunei */

:root {
  --flag-height: 1;
  --flag-width: 2;
  --brunei-yellow: #f7e017;
  --brunei-white: #ffffff;
  --brunei-black: #000000;
}

#brunei {
  position: relative;
  height: 180px;
  aspect-ratio: var(--flag-width) / var(--flag-height);
  background: var(--brunei-yellow);
}

#brunei::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(150deg,
    transparent 0%,
    transparent 35%,
    var(--brunei-white) 35%,
    var(--brunei-white) 45%,
    var(--brunei-black) 45%,
    var(--brunei-black) 55%,
    var(--brunei-white) 55%,
    var(--brunei-white) 65%,
    transparent 65%,
    transparent 100%
  );
}