html {
background-color:#fff;
background-image:linear-gradient(135deg, transparent 0%, #fff 25%, #fff 75%, transparent 100%), url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAgAAAAICAYAAADED76LAAAAIklEQVQoU2N89+7dfwYsQEhIiBEkzDgkFGDzAbIY2Cv4AACvrBgJjYNGfwAAAABJRU5ErkJggg==);
}
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