This is a cool example because you can slightly seethe different circles are the others. One can also see the insides of the circles and the different layers. Its a pretty cool piece with a lot going on if you look closely.

 This is an example of lead with a transparency background. Pretty cool how we have some layers and different folds to him. If it had some different colors that would be cool but as is it has great form and life.

This is an example of pen on a transparent background, I love how symmetrical this piece is and how the fish over lap the background. Very interesting shapes and design here.