Untitled

import turtle
# Set up the screen.
screen = turtle.Screen()
screen.setup(width=800, height=600)
screen.bgcolor("black")
# Create the paddles.
left_paddle = turtle.Turtle()
left_paddle.shape("square")
left_paddle.color("blue")
left_paddle.speed(0)
left_paddle.penup()
left_paddle.goto(-350, 0)
right_paddle = turtle.Turtle()
right_paddle.shape("square")
right_paddle.color("red")
right_paddle.speed(0)
right_paddle.penup()
right_paddle.goto(350, 0)
# Create the ball.
ball = turtle.Turtle()
ball.shape("circle")
ball.color("white")
ball.speed(0)
ball.penup()
ball.goto(0, 0)
# Set up the game loop.
while True:
    # Check for collisions with the paddles.
    if ball.xcor() < -350:
        ball.xcor() = -350
        ball.left(180)
    elif ball.xcor() > 350:
        ball.xcor() = 350
        ball.right(180)
    # Check for collisions with the top and bottom of the screen.
    if ball.ycor() < -200:
        ball.ycor() = -200
        ball.up()
    elif ball.ycor() > 200:
        ball.ycor() = 200
        ball.down()
    # Move the paddles.
    if event.type == "UP":
        left_paddle.up()
    elif event.type == "DOWN":
        left_paddle.down()
    # Move the ball.
    ball.xcor() += ball.xspeed
    ball.