The coder

Dan is a coder.
But his code isn’t some computing language.
He codes with DNA.
Instead of coding a computer virus, he coded an actual virus.
It was a simple virus. It replicated itself.
Dan coded more complicated viruses, then bacteria.
In time, he was coding even more advanced artificial creatures.
And then, he coded a creature that coded other creatures, more advanced than themselves.
“Hi there,” said a creature, standing in front of Dan. “Mind if I do some coding with you?”
Before Dan could say anything, he felt the code flow through him.
And he began this transformation.