From the thumbnail, your image immediately brought a nostalgic smile to my face. As a former fine arts major who also painted, and as my mother was a painter, there's a lot of positive emotional feeling wrapped up in paint tubes for me.
Once I clicked on this one, Nikki, I had to smile an even broader smile due to your "op art" translation. Good for you for making this image the way you did! I think it's just great!