{
  background-size: 20px 20px;
  background-position: center center;
  background-image: linear-gradient(to right, #cbd5e1 1px, transparent 1px), linear-gradient(to bottom, #cbd5e1 1px, transparent 1px);
  -webkit-mask-image: linear-gradient(to bottom, transparent, #fff 50px calc(100% - 50px), transparent), linear-gradient(to right, transparent, #fff 50px calc(100% - 50px), transparent);
  mask-image: linear-gradient(to bottom, transparent, #fff 50px calc(100% - 50px), transparent), linear-gradient(to right, transparent, #fff 50px calc(100% - 50px), transparent);
  mask-composite: intersect;
  -webkit-mask-composite: source-in, xor;
}