<div class="box">
  <div class="content">
    <h2>What is Lorem Ipsum?</h2>
    <p>Mauris volutpat risus quis nisi tempus hendrerit. Nullam nisi urna, suscipit quis risus sed, congue congue quam. Morbi sit amet suscipit ex. Vivamus vel nulla ac libero volutpat ultrices.</p>
  </div>
</div>

html,
body,
.box .content {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: pink;
}

.box {
  width: 300px;
  height: 300px;
  box-sizing: border-box;
  padding: 15px;
  position: relative;
  overflow: hidden;
}

.box::before {
  content: '';
  position: absolute;
  width: 150%;
  height: 150%;
  background: repeating-linear-gradient(
      white 0%,
      white 7.5px,
      hotpink 7.5px,
      hotpink 15px,
      white 15px,
      white 22.5px,
      hotpink 22.5px,
      hotpink 30px);
  transform: translateX(-20%) translateY(-20%) rotate(-45deg);
  animation: animate 20s linear infinite;
}

.box .content {
  position: relative;
  background-color: white;
  flex-direction: column;
  box-sizing: border-box;
  padding: 30px;
  text-align: center;
  font-family: sans-serif;
  z-index: 2;
}

.box,
.box .content {
  box-shadow: 0 0 2px deeppink,
        0 0 5px rgba(0, 0, 0, 1),
        inset 0 0 5px rgba(0, 0, 0, 1);
  border-radius: 10px;
}

.box .content h2 {
  color: deeppink;
}

.box .content p {
  color: dimgray;
}

@keyframes animate {
  from {
    background-position: 0;
  }

  to {
    background-position: 0 450px;
  }
}

/*
Inspired by Online Tutorials channel: https://www.youtube.com/watch?v=JYO7dSZUSfU
*/