Create a new rule called “The Genome” with the following text:

The following letters are considered Nucleotides: A, C, G, T. The Genome is a publicly tracked sequence of Nucleotides.

Create a new rule called “Synthesis” with the following text:

If they have not done so since the last time the Synthesize action was performed, each Genetic Engineer should, at their earliest convenience, privately submit to the Head Researcher a single Mutation that they wish to perform, or the fact that they do not want to perform any Mutations.
A Mutation consists of changing the Nucleotide at a specified position in the Genome to a different Nucleotide. If a Genetic Engineer has made multiple such submissions, only their most recent submission is considered valid.

The Head Researcher can and should perform the Synthesize action once every Genetic Researcher has made a new submission to the Head Researcher since the last time the Synthesize action was taken (or since this rule was enacted if the Synthesize action has not been performed yet).

Synthesize is an atomic action consisting of the following steps:
* Perform every valid Mutation submitted, with the following exception: if two or more Mutations specify the same position, the Nucleotide at that position remains unchanged.
* Processing from left to right, take the first 3 Nucleotides in the Genome not yet processed in this step and follow the corresponding instructions in the rule “Codons”. Repeat as long as there are at least 3 Nucleotides left to be processed.
* Add a random Nucleotide to the beginning of the Genome.

Create a new rule called “Codons” with the following text:

The following table lists sequences of three Nucleotides (known as Codons), along with their corresponding effect when the Synthesize action is performed. If a Codon does not appear in the table, it is considered to have no effect.

Append an empty table to the end of the rule Codons.

Set the Genome to be a random sequence of 9 Nucleotides.