$line-color: hsla(205,80%,40%,1);

html {
	font-size: .8em;
	
	background-color: #222;
	background-image:
		// <> 
		linear-gradient(
		    25deg,
			  transparent 65%,
			  $line-color,
			  transparent 70%
		    ),
		linear-gradient(
		    -25deg,
			  transparent 65%,
			  $line-color,
			  transparent 70%
		    ),
		linear-gradient(
		    -25deg,
			  transparent 30%,
			  $line-color,
			  transparent 35%
		    ),
		linear-gradient(
		    25deg,
			  transparent 30%,
			  $line-color,
			  transparent 35%
		    ),		
		
		// ◊
		linear-gradient(
		    65deg,
			  transparent 65%,
			  $line-color,
			  transparent 70%
		    ),
		linear-gradient(
		    -65deg,
			  transparent 65%,
			  $line-color,
			  transparent 70%
		    ),
		linear-gradient(
		    -65deg,
			  transparent 30%,
			  $line-color,
			  transparent 35%
		    ),
		linear-gradient(
		    65deg,
			  transparent 30%,
			  $line-color,
			  transparent 35%
		    );
	background-size: 
		5em 2em,
		5em 2em,
		5em 2em,
		5em 2em,
		
		2em 5em,
		2em 5em,
		2em 5em,
		2em 5em;
	}