The Double helix is made of two structure strands and the little stairs connecting the two strands.

Each of the stairs is the combination of one letter and the complement letter. C and G are complement and A and T are complement. for example:

--C---T---A-- on one strand has the complement 
  |   |   |
--G---A---T-- on the other strand. 

We read only on one of the two strands. This single strand is called RNA. The other side is an inverse copy.

Each letter represents now an I Ching Bigram. There are four of them.

Their value is 0, 1, 2 or 3.

G 0 Earth    A 1 Water      T 2 Fire      C 3 Air
   = =          ===            = =         === 
   = =          = =            ===         ===

Each hexagram or RNA codon is now constructed with three of this letters
Some examples:

RNA     TAG         CCG         AGT
Reading Codon left to right is hexagram bottom to top.
First letter of Codon is bottom bigram.

Bottom  Fire        Air         Water
Middle  Water       Air         Earth 
Top     Earth       Earth       Fire

For the binary value of each codon you have to do the following:
on the top multiply bigram value with 1
on the center multiply bigram value with 4
on the bottom multiply bigram value with 16

Top      0            0           2 
Middle   4           12           0
Bottom  32           48          16
-------------------------------------
Binary  36           60          18 

In a cube all this makes sense.
This cube is numbered for each cell starting at the bottom with 0=GGG 1=GGA in zig zag lines up to 63=CCC.

Scroll up again and see that in any direction there is only one letter changing.
Observe the diagonal relations in any direction through the cube.

How did this start?

1. A green eight cell starter cube arrangement. (2 x 2 x 2) 8 elements.
2. Twenty-four orange fields grow on the edges of the original green cube. (2 x 2 x 2 + 6 x 4) 32 elements.
3. Thirty-two blue elements completete the growth cycle. (4 x 4 x 4) 64 elements.