Coches de lado a lado en python

numcoches = 10

cars = [] 

def setup():

    size(800, 600)

    global cars

    cars = []

    for i in range(numcoches):

        c = color(random(0, 255), random(0, 255), random(0, 255))

        xpos = random(20, width - 20)

        ypos = random(20, height - 20)

        xspeed = random(-5, 5)

   

        while (xspeed) < 1:

            xspeed = random(-5, 5)

        cars.append(Car(c, xpos, ypos, xspeed))

def draw():

    background(255)

    for car in cars:

        car.drive()

        car.display()

class Car:

    def __init__(self, tempC, tempXpos, tempYpos, tempXspeed):

        self.c = tempC

        self.xpos = tempXpos

        self.ypos = tempYpos

        self.xspeed = tempXspeed

    def display(self):

        stroke(0)

        fill(self.c)

        rectMode(CENTER)

        rect(self.xpos, self.ypos, 40, 20)  

    def drive(self):

        self.xpos += self.xspeed

       

        if self.xpos > width + 20:

            self.xpos = -20

        elif self.xpos < -20:

            self.xpos = width + 20