This is a mandala I had drawn in the beginning of my sophomore year in high school. In every art class, (regardless of which one) you're required to draw a mandala as an assignment.
I used colored pencils then highlighted the edges on paintshop when on the computer because the color would not show up in the picture. There are too many layers to use a flash. I'd estimate it took me around 2-3 weeks to finish it then I went back and redid it again for a competition which it did not win but I am still happy with it.