You're arguing with a straw pigeon. There's no logic to convince that person. You could put them in a time machine and walk them through the evolution of life and they still wouldn't change their mind.

Not a believer, but I recently learned that a correct reading of the original Hebrew doesn't say he created everything. He created the waters and the earth from the void that was already there.

Back to the sign. Dude is making the claim; he has to support it. Evolution is the most proven theory we have, it has been tested over and over. He'd first have to understand the basics of evolutionary theory, which I guarantee he doesn't know; he wouldn't be there if he did.