PADDLE_DISTANCE = 30


class Paddle(Turtle):

    def __init__(self, coordinates):
        super().__init__()
        self.shape("square")
        self.shapesize(stretch_len=PADDLE_SIZE)
        self.color("white")
        self.speed("fastest")
        self.setheading(90)
        self.penup()
        self.goto(coordinates)

    def up(self):
        if self.ycor() > 240:
            pass
        else:
            self.forward(PADDLE_DISTANCE)

    def down(self):
        if self.ycor() < -240:
            pass
        else:
            self.backward(PADDLE_DISTANCE)