When I was a kid (15-17, I think), I made some floor/ground tile graphics for use in a video game. I don't remember which game, and I don't remember whether they were eventually used, but here they are. Years after making them, I found them on my computer and decided to publish them.

These tiles are very easy to make, no talent is required at all. But if they're good enough for you and/or you need some initial graphics for testing the code, they'll save you the time required to make them.

You can use them under CC-BY-SA 3 or 4 or any later version.