$s: 60px;

html {
	background:
		repeating-conic-gradient(from 45deg, 
				#000 0% 25%, #eee 0% 50%) 
			50%/ #{$s $s}
}
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External CSS

This Pen doesn't use any external CSS resources.

External JavaScript

  1. https://leaverou.github.io/conic-gradient/conic-gradient.js