We see here at level 1, there is 5 segments.
Each one is 1/3 of the original.
So the length is 5/3 times L.
So at level 2, we would have 5 squared over 3 squared
times L. Or 25/9 of L. At level N, well we'd have
5/3 raised to the N power.
And the fractal dimension is the number
of copies, 5, divided by the reduction factor, 3.
So it's log 5 divided by log 3.