CS 111 - 2/21/17

   Picture
     => rows and columns of Pixels
         => Color
              =>  Red Amount, Green Amount, Blue Amount
                   =>  integer value from 0 to 255


Gray Scale Picture has the red, green and blue values
    all the same.

   Black =>        0,   0,   0 
   White =>       255, 255, 255
   Gray  =>       127, 127, 127
   Light Gray =>  192, 192, 192