# wiggle.py
#
# a demo of Zelle's graphic library
#
#  new python functions:
#
#     from random import randint
#     randint(low, high)   low <= random num <= high
#
#     from time import sleep
#     sleep(2)             do nothing for 2 sec
#
# Jim M | Sep 2011 | MIT License

from graphics import *
from time import sleep
from random import randint

def main():
    window = GraphWin("wiggle", 300, 300)
    dot = Circle(Point(150,150), 20)
    dot.setFill("red")
    dot.draw(window)
    for i in range(100):
        dx = randint(-5, 5)   # pixels
        dy = randint(-5, 5)
        dot.move(dx, dy)
        sleep(0.1)            # in seconds
    wait = window.getMouse()

main()