First of all, you find a medium picture of a gray person.
Cut it into multiple equal squares *(medium)

Get a blank paper. (construction paper)
Cut it into a multiple equal squares *(BIG SIZE)
Use a "drawing pencil"
For every "picture square", draw a matching picture on a "blank square".
Color, shade, fade, blur, smear, swift, and contrast.

After you're done, get 2 black construction paper. (Blank, recommended)
You connect the entire “picture square" on the blank construction paper
Leave about 2 inch gap for every side.

Do the same thing with the "color box".

Compare both of the artwork.

Fix and shade to improve the image.