import turtle

nl = turtle.Screen()
nl.bgcolor("black")
nl.setup(width=800, height=600)
nl.title("Pong")
nl.tracer()
nl.exitonclick()

while True:
    nl.update()

paddle_A = turtle.Turtle()
paddle_A.speed(0)
paddle_A.shape("square")
paddle_A.color("white")
paddle_A.penup()
paddle_A.goto(-350, 0)