from random import *
from graphics import *
from time import *
def main():
    e = GraphWin (" Hello " , 500,500)

    for i in range(100):
        sleep (0.5)
        c = Circle (Point ( randrange (0,500),randrange (0,500)), randrange (0,100))
        c.setFill (color_rgb (randrange (0,255),randrange (0,255),randrange (0,255)))
        c.draw(e)

    e.getMouse()
    e.close()
main()