from turtle import Turtle

class Paddle(Turtle):
    def __init__(self, x_pos):
        super().__init__()

        self.shape("square")
        self.shapesize(stretch_wid=5, stretch_len=1)
        self.color("white")
        self.pu()
        self.teleport(x=x_pos, y=0)        

    def up(self):
        self.goto(x=self.xcor(), y=self.ycor()+20)

    def down(self):
        self.goto(x=self.xcor(), y=self.ycor()-20)