# Tk_pseudo_maze.py

# Tk_pseudo_maze.py

import math
import time
from Tkinter import *
import random

root = Tk()
width,height=680,680
root.geometry("%dx%d+-10+0"%(width,height))
canvas = Canvas(root,width=width, height=height, background="grey" )
canvas.grid()

running = True

# size of square, in pixels
square = 20
above = {}
lean = [0.1,0.9]
def drawScreen():
    canvas.delete('all')
    # Python version of 10 PRINT happens here
    for y in range(0, height, square):
        for x in range(0, width, square):
            fwd = random.choice(lean) > 0.5
            try:
                yy = y-square
                m = above[x-square,yy]+above[x,yy]+above[x-square,y]
                if m in ('bff'):
                    fwd = 1
                elif m in ('fbb'):
                    fwd = 0
            except:
                0
            if fwd:
                # /
                canvas.create_line((x, y), (x + square, y + square))
                above[x,y] = 'f'
            else:
                # \
                canvas.create_line((x, y + square), (x + square, y))
                above[x,y] = 'b'
    t = time.time()+5
    while t > time.time():
        canvas.update()

while running:
    drawScreen()