One big panel with the Earth in the background and a strand of DNA spiraling out towards us. Where it hits the Earths surface, it will be spreading out to cover the the surface like roots/capillaries.
This code took the form of a double spiral thread,
which copied so well, that it rapidly spread.
We know this because most life to this day,
is written in the language of that same DNA.
Everything about us, it manages to say,
with four nucleotides: G, C, T and A.
In lines so long they’d reach clear to next May!