Mixed Media Drawing

I picked a photo of my cat to try and draw on paper with two charcoal pencils, one is a white charcoal pencil and the other is a black charcoal pencil. First I found out the length and width I would need for this to work and then I made a grid, after that I blocked off the outside of the grid with tape so that charcoal wouldnt get out of the grid, at that point I started drawing with the charcoal pencils.