import multiprocessing
import time

class Car:

    color = None

    def __init__(self):
        self.color = "green"

    def changeColor(self, color):
        self.color = color

    def getColor(self):
        return self.color

car1 = Car()

def carshop():
    car1.changeColor("red")
    print(car1.getColor())

th = multiprocessing.Process(target = carshop, args=())
th.start()

time.sleep(2)

print(car1.getColor())

red
green

red
red