Half Skull - Pen Drawing

Hi all!

Here is my new pen drawing. It's really been a while I drew a skull.

This time, I drew a half human skull lying on a ground. The mouth and jaw parts of the skull have been removed leaving only the upper part.

Within the eyes and nose hollows are shades of red and blue ink signifying danger.

I also love how the ground appears. It shows a great deal of perspective with just a few cross hatching strokes.

The drawing was done with a blue and red ballpoint pen. My steps are below:

Thank you.