GRID_SIZE = 30
CELL_SIZE = 30 

SCREEN_WIDTH = GRID_SIZE * CELL_SIZE
SCREEN_HEIGHT = GRID_SIZE * CELL_SIZE

WHITE = (255, 255, 255)
BLACK = (0, 0, 0)
GREEN = (0, 255, 0)
RED = (255, 0, 0)
BLUE = (0, 0, 255) 

UP = (0, -1)
DOWN = (0, 1)
LEFT = (-1, 0)
RIGHT = (1, 0)

FPS = 10

REWARD_FOOD = 60
REWARD_COLLISION = -60
REWARD_STEP = -0.1 
OBSERVATION_SPACE_SIZE = 11