Variable CHECKER_CSS_IMAGE`Const`

CHECKER_CSS_IMAGE: "repeating-conic-gradient(#e5e7eb 0% 25%, #fff 0% 50%)" = 'repeating-conic-gradient(#e5e7eb 0% 25%, #fff 0% 50%)'

Checkerboard gradient image (no size). Use in background-image with a separate background-size.