6. Pygame - random boje i for petlja 

import pygame

import random

pygame.init()

prozor = pygame.display.set_mode((800,600))

pygame.display.set_caption("Slika")

prozor.fill(pygame.Color("White"))

#Crtanje koncentricnih krugova. Racunar random bira boje.

for i in range(10):

    boja1=random.randint(0,255)

    boja2=random.randint(0,255)

    boja3=random.randint(0,255)

    pygame.draw.circle(prozor, pygame.Color(boja1,boja2,boja3),(400,300),200-i*20,0)

#Crtanje paralelnih linija.

for i in range(12):

    boja1=random.randint(0,255)

    boja2=random.randint(0,255)

    boja3=random.randint(0,255)

    pygame.draw.line(prozor, pygame.Color(boja1,boja2,boja3), (0,0+i*50), (800,0+i*50),5)

pygame.display.update()

while pygame.event.wait().type != pygame.QUIT:

    pass

pygame.quit()