<div class="gradient-pattern"></div>

body {
  padding: 1.5rem;
}

.gradient-pattern {
  background: linear-gradient(135deg, #333 25%, transparent 25%) -50px 0,
    linear-gradient(225deg, #333 25%, transparent 25%) -50px 0,
    linear-gradient(315deg, #333 25%, transparent 25%),
    linear-gradient(45deg, #333 25%, transparent 25%);
  background-size: 100px 100px;
  background-color: #ff8a00;
  height: 250px;
}