Draw Something

import pygame

pygame.init()
pygame.display.set_caption('Hello World!')
window = pygame.display.set_mode((500, 400))
running = True

#Draw Once
pygame.draw.rect(window, (0, 255, 0),(50, 50, 100, 50))
pygame.draw.ellipse(window, (0, 0, 255),(100, 190, 60, 30))
pygame.display.update()

#Main Loop
while running:
    for event in pygame.event.get():
        if event.type == pygame.QUIT:
            running = False