Python 2.7 Bubble-Sort Visualization with pygame

#Python 2.7 Bubble-Sort Visualization By Lucid Potato
import pygame
from random import randint
import winsound #Remove if on Linux
pygame.init()
size = (500,500)
window = pygame.display.set_mode((size))
pygame.display.set_caption("Pygame Bubble-Sort Visualization")
black = pygame.Color(0,0,0)
white = pygame.Color(255,255,255)

heightList = []
listLength = 100
xList,y,w = [],0,5
tmpX = 0
for i in range(listLength):
    heightList.append(randint(0,500))
    xList.append(tmpX)
    tmpX += w
def draw():
    global xList,y,heightList
    for i in range(listLength):
        pygame.draw.rect(window,white,(xList[i],y,w,heightList[i]),0)

isSorted = False
sortedCount = 0
trackInt = 0
while True:
    window.fill(black)
    if trackInt == listLength-1:
        trackInt = 0
    if sortedCount > listLength and isSorted == False:
        print("Sorted!")
        print(heightList)
        isSorted = True
    if heightList[trackInt] > heightList[trackInt+1] and isSorted == False:
        tmp = heightList[trackInt+1]
        heightList[trackInt+1],heightList[trackInt] = heightList[trackInt],tmp
        sortedCount = 0
        trackInt += 1
        winsound.Beep(heightList[trackInt] + 2000,10) #Remove if on Linux
    else:
        sortedCount += 1
        trackInt += 1
        winsound.Beep(1000,5) #Remove if on Linux
    draw()
    pygame.display.update()
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            pygame.quit()