Here is this week's free background image. It's yours for use in Powerpoint (or another similar presentation program) - or for any other type project you might envision. Use it at home, at work, at school, at church, on the moon. Use it where and how you will. I only ask that you share it freely and that you tell others that you found it here.
For those who are interested in knowing such details, this picture comes from a photograph of the bottom of a frying pan. I did the same thing in this picture: Found Object Still Life