# Tk_sparkler.py

# Tk_sparkler.py

from Tkinter import *
from random import randrange as rnd, random
import time

root = Tk()
root.geometry('800x600')
canv = Canvas(bg='#ADC5E3')
canv.pack(fill=BOTH,expand=1)

class Pixel():
    def __init__(self,x,y,dx,dy,r,dr):
        self.x = x
        self.y = y
        self.dx = dx
        self.dy = dy
        self.r = r
        self.dr = dr
        color = 'yellow'
        self.id = canv.create_oval(x-r,y-r,x+r,y+r,fill=color,outline='')

    def move(self):
        self.x += self.dx/2
        self.y += self.dy/2
        self.dx *= 0.99
        self.dy *= 0.99
        self.r -= self.dr
        if self.r > 0:
            canv.coords(self.id,self.x-self.r,self.y-self.r,self.x+self.r,self.y+self.r)
            root.after(20,self.move)
        else:
            canv.delete(self.id)
            if rnd(4) == 0:
                p = Pixel(self.x,self.y,rnd(-10,10),rnd(-10,10),random()*2,0.1+random())
                p.move()


def newPixel():
    p = Pixel(mx,my,rnd(-10,10),rnd(-10,10),rnd(5,9),0.1+random())
    p.move()
    root.after(10,newPixel)

def move(event):
    global mx,my
    mx,my = event.x,event.y

count = 0
mx = 400
my = 300
canv.bind('<Motion>',move)

newPixel()

mainloop()