CodePen Embed - GRID Background Pattern : Pure CSS

<body>
  <h1 style="font-style:italic; font-family:arial;">GRID CHECK pattern</h1>
</body>

body{
  background-image: linear-gradient(0deg, transparent 31px, #333 32px),linear-gradient(90deg,  transparent 31px, #333 32px);
  background-color: #ddd;
	background-size: 32px 32px;
}

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