每次刺猬碰撞到星星时，我们给记分板添加一分。
- 从 中，将 Global Variable 拖动到碰撞事件内部。将变量更改为 points。
- 从 中，将 Add Value 拖动到碰撞事件内部。将变量更改为 points。
- 使用 Update Display 将新的 points 值更新到 score_board 中。
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stage.set_background("moon")
sprite = codesters.Sprite("hedgehog")
sprite.go_to(0, -210)
points = 0
score_board = codesters.Display(points, -209, -209)
def left():
sprite.turn_left(20)
stage.event_left_key(left)
def right():
sprite.turn_right(20)
stage.event_right_key(right)
def up():
sprite.move_forward(600)
stage.wait(1)
sprite.go_to(0, -210)
stage.event_up_key(up)
def interval():
rand_x = random.randint(-250, 250)
rand_y = random.randint(-100, 250)
goal_star = codesters.Star(rand_x, rand_y, 5, 15, "yellow")
# add any other actions...
stage.event_interval(interval, 2)
def collision(sprite, hit_sprite):
hit_sprite.hide()
# add any other actions...
sprite.event_collision(collision)
