  For any natural number $d$ and positive number $\varepsilon$, we present a
point set in the $d$-dimensional unit cube $[0,1]^d$ that intersects every
axis-aligned box of volume greater than $\varepsilon$. These point sets are
very easy to handle and in a vast range for $\varepsilon$ and $d$, we do not
know any smaller set with this property.
