TODO

--DONE-- * Paint or place a static snake on the screen
            * Assume the snake is composed of blocks 

--DONE-- * Create a simple page that will host the game

--DONE-- * Create a key listener on the grid so that the snake can move
--DONE-- * Move the snake one cell at a time from left to right
--DONE-- * Extract a Snake class that is responsible for snake's behavior
--DONE-- * Create a ghost snake that randomly roams around

--DONE-- * Extract a Direction class that is responsible for the direction 
           and the deltas 

--DONE-- * Make snake and ghostSnake local. they're currently global and hackable.

--DONE-- * Change color of ghost snake


--DONE-- * Generate food periodically
--DONE-- * Allow snake to eat food when food becomes available
--DONE-- * Upon eating the food, snake should grow tall
--DONE-- * If snake touches itself or the walls, the game should be over
--DONE-- * Add a scoring mechanism
--DONE-- * Add special food.
--DONE-- * Added wrap in ghost snake.
--DONE-- * if snake's head touches any part of ghost snake it should die.