# Tk_starfield_2.py

# Tk_starfield_2.py

from Tkinter import *
from random import randint as rnd
from time import time

ww = 1200
hh = 600

root = Tk()
root.title("Tk_starfield_2")
root.geometry("%dx%d+0+0"%(ww,hh))
canvas = Canvas(root, width=ww, height=hh, bg='black')
canvas.grid()

def rgb2hex(rgb): # pass
    r,g,b = rgb
    return "#%02x%02x%02x" % (r,g,b)

def e(z): # pass
    if not z: return 1
    return z/50.0

W = ww*8
H = hh*8
class Star:

    def __init__(self):
        self.x = rnd(-W, W)
        self.y =  rnd(-H, H)
        self.z = rnd(0, ww)

        self.pz = self.z

    def Update(self):
        self.z -= 100

        if self.z < 0:
            self.z = ww
            self.x = rnd(-W, W)
            self.y =  rnd(-H, H)

            self.pz = self.z


    def Draw(self):
        pz = self.pz
        z = self.z

        sx = (self.x/e(z))+ww/2
        sy = (self.y/e(z))+hh/2

        px = (self.x/e(pz))+ww/2
        py = (self.y/e(pz))+hh/2

        r = int(self.z)

        canvas.create_line((px, py, sx, sy), fill='white', width=1)

        self.pz = self.z

count = 200
stars = [Star() for _ in range(count)]

while 1:
    t = time()+0.05
    canvas.delete('all')

    for star in stars:
        star.Update()
        star.Draw()
    while t > time():
        canvas.update()
canvas.Quit()