python_robot_process.py

import pygame
import multiprocessing

window_width = 500
window_height = 500

win = pygame.display.set_mode((window_width, window_height))

class Robot():
    def __init__(self):
    
        self.x = 200
        self.y = 200

        self.width = 20
        self.height = 20

        self.xvel = 0
        self.run = True
            
        
    def forward(self):
        self.xvel = 10
            
    def stop(self):
        self.xvel = 0
        
    def start(self):
        pygame.init()
        while self.run():
            
            pygame.time.delay(10)
            if (self.x < window_width - 20):
                self.x += self.xvel
            else:
                self.x = window_width - 20
            
            win.fill((0,0,0))
            pygame.draw.rect(win, (255,0,0), (self.x, self.y, self.width, self.height))
            pygame.display.update()
        print("stopping")
        pygame.quit()
            
    def quit(self):
        print("called quit")
        self.run = False
        
        
robot = Robot()

def start_simulator():
    robot.start()

robot_process = multiprocessing.Process(target=start_simulator)
#robot_process.start()