about border-radius

[a1exlism]

http://cssreference.io/property/border-radius/

The description of two value may be a mistake.
From [MDN[(https://developer.mozilla.org/en-US/docs/Web/CSS/border-radius) about this two value,
the first is top-left/bottom-right and the second is top-right/bottom-left;

And could it be possible if add more border-radius example like 4 value(clockwise); slash value.etc