# wiggle2.py
#
# a few more tricks on top of wiggle.py
#
#  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
#
# Clicking in the window once it's stopped will quit cleanly.
#
# Or type "control-C" at the command promopt at any time 
# to interrupt the program.
#
# Jim Mahoney | Marlboro College | Sep 2013 | MIT License

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

def main():
    window = GraphWin("wiggle", 500, 500)
    dot = Circle(Point(300, 300), 10)
    dot.setFill("red")
    dot.draw(window)
    x = 300
    y = 300
    for i in range(200):
        dx = randint(-2, 2) # pixels per timestep
        dy = randint(-2, 2)
        for j in range(5):
            #
            line = Line(Point(x,y), Point(x+dx, y+dy))
            line.setFill("grey")
            line.draw(window)
            x = x + dx
            y = y + dy
            #
            sleep(0.02)              # in seconds
            dot.move(dx, dy)         # one time step
            speed = randint(2, 5)
            dx = dx + randint(-speed, speed)
            dy = dy + randint(-speed, speed)
    wait = window.getMouse()

main()