import pygame

pygame.init()

screen = pygame.display.set_mode((640, 480))
pygame.display.set_caption("Display Text")
clock = pygame.time.Clock()

BG    = (20, 20, 20)
WHITE = (255, 255, 255)

# pygame.font.SysFont(font_name, size) — use None for the default font
font_large = pygame.font.SysFont(None, 64)
font_small = pygame.font.SysFont(None, 32)

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

    screen.fill(BG)

    # render() returns a Surface; blit() draws it onto the screen
    title_surf = font_large.render("Hello, pygame!", True, WHITE)
    screen.blit(title_surf, (100, 180))

    hint_surf = font_small.render("Close the window to quit.", True, (160, 160, 160))
    screen.blit(hint_surf, (170, 270))

    pygame.display.flip()
    clock.tick(60)

pygame.quit()