In his book ' Genetic Programming ', John Koza has developed a simple, seed methodology for the autonomous programming of computers. Computer programs are ultimately just text. Like poetry, source code comprises structured lines on a page. Also like poetry, there are many forms of source code, in a variety of languages. Unlike poetry however, source code is quite capable of self replication, adaption, modularisation, and interaction.
Software can spawn threads, perform cross-over operations, add, and make pretty pictures.
Software is a better memetic carrier than the human imagination because within the digital realm lies the potential for RoboMemes. Cybernetically enhanced cultural expectations, driven by poetry that does stuff. A small piece of self replicating code that eats Apple Logos and shits out Microsoft Logos. As an observer you may like this, or be unable to detect that it is happening. If so the ad virus is a winner and has found a host.