Functions

Complete the function definitions and calls. Fill each blank with the correct parameter, keyword, or return value.

def ▢1(screen, snake, food):
    """Draw the game world each tick."""
    screen.fill(BG)
    for i, (cx, cy) in ▢2(snake):
        colour = (0,180,60) if i == 0 else GREEN
        pygame.draw.rect(screen, colour,
            pygame.Rect(cx*CELL_SIZE, cy*CELL_SIZE, CELL_SIZE-2, CELL_SIZE-2),
            border_radius=4)
    fx, fy = food
    pygame.draw.circle(screen, RED,
        (fx*CELL_SIZE+CELL_SIZE//2, fy*CELL_SIZE+CELL_SIZE//2), CELL_SIZE//3)
    pygame.display.▢3()

def spawn_food(snake):
    """Return a random food position not overlapping snake."""
    while True:
        pos = (random.randint(0,GRID_COLS-1), random.randint(0,GRID_ROWS-1))
        if pos ▢4 snake:
            ▢5 pos

# ── inside the game loop ──
draw(▢6, snake, food)
food = spawn_food(▢7)

The function definitions below have 3 bugs. Type the corrected line for each.

def draw(snake, food):    # Bug 1 – missing parameter
    screen.fill(BG)
    # ... drawing code ...
    pygame.display.flip()

def spawn_food(snake):
    while True:
        pos = (random.randint(0,GRID_COLS-1), random.randint(0,GRID_ROWS-1))
        if pos not in snake:
            pass          # Bug 2 – nothing is returned

font = pygame.font.SysFont("Arial", 20, bold=True)
def draw_score(score):
    surf = font.render(f"Score: {score}", True, WHITE)
    screen.blit(surf, (8, 6))

# In the game loop:
draw(snake)               # Bug 3 – missing argument

Write a `draw_score(screen, score)` function that renders the score in the top-left corner using `pygame.font.SysFont`. Make sure `screen` is a parameter, not a global.

font = pygame.font.SysFont("Arial", 20, bold=True)

def draw_score(screen, score):
    # YOUR CODE: render f"Score: {score}" in WHITE
    # blit it at position (8, 6)
    pass

# Call it inside your draw() function:
# draw_score(screen, score)

**Challenge:** Refactor the entire drawing pipeline so `draw()` calls `draw_score()` internally. Then write a second function `draw_grid(screen)` that overlays a faint grid on the background. Paste both functions and explain how you chose their parameters.

Answer each prompt thoughtfully. There are no right or wrong answers — this is your own reflection.