Hilbert Curve
The Hilbert Curve is a very famous curve with quite interesting characteristics. It is a onedimensional line which completely fills a twodimensional square without ever crossing itself. It is worth mentioning that this was already postulated in 1891 by David Hilbert.
Recursions : 5
Angle : 90°
Axiom : A
Rules : A=BF+AFA+FB
B=+AFBFBFA+
 We start with an ushape.
 The middle third of the base line forms a "u" towards the center. The two side lines get also such a "u" on each end.
 We repeat this process on the newly emerged "u"'s over and over again,...
 ... we get this squarefilling figure.

