import random

def SimpleBug1():

    # the environment
    worldXSize = 80
    worldYSize = 80

    # the bug
    xPos = 40
    yPos = 40


    for i in range(100):
        xPos += randomMove()
        yPos += randomMove()
        xPos = (xPos + worldXSize) % worldXSize
        yPos = (yPos + worldYSize) % worldYSize
        print "I moved to X = ", xPos, " Y = ", yPos

def SimpleBug2():

    # the environment
    worldXSize = 80
    worldYSize = 80

    # the bug
    xPos = 40
    yPos = 40


    for i in range(100):
        xPos += randomMove()
        yPos += randomMove()
        xPos = (xPos + worldXSize) % worldXSize
        yPos = (yPos + worldYSize) % worldYSize
        print "I moved to X = ", xPos, " Y = ", yPos


def randomMove():
    return random.randint(-1, 1)

SimpleBug1()
SimpleBug2()