#!/usr/bin/env python

# Written by: DGC

#==============================================================================

class RCCar(object):

def __init__(self):

self.speed = 0

def change_speed(self, speed):

self.speed = speed

print("RC car is moving at " + str(self.speed))

#==============================================================================

class RCAdapter(object):

def __init__(self):

self.car = RCCar()

def move_forwards(self):

self.car.change_speed(10)

def move_backwards(self):

self.car.change_speed(-10)

def stop(self):

self.car.change_speed(0)

#==============================================================================

class RemoteControl(object):

def __init__(self):

self.adapter = RCAdapter()

def stick_up(self):

self.adapter.move_forwards()

def stick_down(self):

self.adapter.move_backwards()

def stick_middle(self):

self.adapter.stop()

#==============================================================================

if (__name__ == "__main__"):

controller = RemoteControl()

controller.stick_up()

controller.stick_middle()

controller.stick_down()

controller.stick_middle()