Robot Moving Cursor

import pyautogui, time

print(pyautogui.size())
print(pyautogui.position())

w, h = pyautogui.size()
center, seconds, direction, boundary = (w / 2, h / 2), 5, -1, 200
pyautogui.moveTo(center)

print('Robot running... Press Ctrl-C to quit.')
try:
    i = 1
    while True:
        x, y = pyautogui.position()

        if i > 1:
            direction *= -1
            i = 0

        pyautogui.move(0, boundary * direction, seconds)
        time.sleep(seconds)
        i += 1

except KeyboardInterrupt:
    print('\n')