Python Turtle Pong Game with AI Paddle – Step‑by‑Step Tutorial

This tutorial demonstrates how to create a classic Pong game in Python using the turtle library, featuring an AI opponent paddle that tracks the ball with 100% accuracy and a user‑controlled paddle.

Step 1 – Import turtle and set up the screen

import turtle
import random
s = turtle.Screen()
s.title("Pong")
s.bgcolor("black")
s.setup(width=600, height=400)

Step 2 – Create the ball

ball = turtle.Turtle()
ball.speed(0)
ball.shape("circle")
ball.color("white")
ball.penup()
ball.goto(0, 0)
ball.dx = 4
ball.dy = 4

Step 3 – Create the AI paddle

ai = turtle.Turtle()
ai.speed(0)
ai.shape("square")
ai.color("white")
ai.penup()
ai.goto(-250, 0)
ai.shapesize(stretch_wid=5, stretch_len=1)

Step 4 – Create the player paddle

you = turtle.Turtle()
you.speed(0)
you.shape("square")
you.color("white")
you.penup()
you.goto(250, 0)
you.shapesize(stretch_wid=5, stretch_len=1)

Step 5 – Define a function to move the AI paddle

def move_ai_paddle():
    y = ball.ycor()
    if y > 0:
        ai.sety(ai.ycor() + 2)
    else:
        ai.sety(ai.ycor() - 2)

Step 6 – Define functions to move the player paddle with the keyboard

def paddle2_up():
    y = you.ycor()
    y += 20
    you.sety(y)

def paddle2_down():
    y = you.ycor()
    y -= 20
    you.sety(y)

s.listen()
s.onkeypress(paddle2_up, "Up")
s.onkeypress(paddle2_down, "Down")

Step 7 – Main game loop

while True:
    s.update()
    # Move the ball
    ball.setx(ball.xcor() + ball.dx)
    ball.sety(ball.ycor() + ball.dy)
    # Collision with top/bottom walls
    if ball.ycor() > 190 or ball.ycor() < -190:
        ball.dy *= -1
    # Move AI paddle toward the ball
    if ball.ycor() > ai.ycor():
        ai.sety(ai.ycor() + 4)
    elif ball.ycor() < ai.ycor():
        ai.sety(ai.ycor() - 4)
    # End‑game conditions
    if ball.xcor() > 300:
        turtle.textinput("Game End", "You Loss Pong Game With AI!")
        break
    if ball.xcor() < -300:
        turtle.textinput("Game End", "You Win Pong Game With AI!")
        break
    # Collision with AI paddle
    if (ball.xcor() < -240 and ball.xcor() > -250) and (ball.ycor() < ai.ycor() + 40 and ball.ycor() > ai.ycor() - 40):
        if random.random() < 0.9:  # 90% chance of collision
            ball.dx *= -1
    # Collision with player paddle
    if (ball.xcor() > 240 and ball.xcor() < 250) and (ball.ycor() < you.ycor() + 40 and ball.ycor() > you.ycor() - 40):
        ball.dx *= -1

turtle.exitonclick()

The full source code is provided above, ready to copy into any Python editor and run to experience a functional Pong game with an AI opponent.