im trying to build a pong game but i cant get rid of a line

```
import turtle

sc = turtle.Screen()
sc.setup(width=1000, height=1000)
sc.title("pong")
sc.bgcolor("black")

def paddle_a():
    paddle = turtle.Turtle()
    paddle.color("white")
    paddle.shape("square")
    paddle.shapesize(stretch_wid=5, stretch_len=2)
    paddle.goto(-400, 0)
    paddle.speed(0)
    paddle.penup()

def paddle_b():
    pass

while True:
    paddle_a()
    sc.update()

```

ive tried turtle.turtlehide() but no luck

[![](https://i.stack.imgur.com/xZ5V5.png)](https://i.stack.imgur.com/xZ5V5.png)