# draw random circles with module pygame
# pygame free from: http://www.pygame.org/ 
 
import pygame as pg
import random as rn
 
# color rgb tuples
black = 0, 0, 0
blue = 0, 0, 255
green = 0, 255, 0
olive = 128, 128, 0
orange = 255, 165, 0
magenta = 255, 0, 255 
red = 255, 0, 0
yellow = 255, 255, 0
white = 255, 255, 255
color_list = [red, blue, green, yellow, olive, orange, magenta]
 
# window/screen width and height
w = 500
h = 500 
screen = pg.display.set_mode((w, h))
pg.display.set_caption('Draw a number of random circles')
screen.fill(black)
 
# draw n circles
n = 20 
for k in range(n):
    x = rn.randint(10, w)
    y = rn.randint(10, h)
    radius = rn.randint(2, h//3)
    color = rn.choice(color_list) 
    position = x, y
    # circle border width = 2  
    pg.draw.circle(screen, color, position, radius, 2)
 
# update display 
pg.display.flip()
 
# event loop ...
running = True 
while running:
    for event in pg.event.get():
        # quit when window corner x is clicked
        if event.type == pg.QUIT:
            running = False