import pygame

# Homework: draw three circles of different sizes.
# 1. Pick three radius values: small, medium, large (e.g. 20, 50, 90).
# 2. Draw each circle at a different position on screen.
# 3. Give each circle a different color.
# Tip: pygame.draw.circle(screen, color, (center_x, center_y), radius)

pygame.init()

screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("Circle Sizes")

BG = (15, 15, 40)

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

    screen.fill(BG)

    # TODO: draw three circles of different sizes here

    pygame.display.flip()

pygame.quit()