import pygame, sys
from pygame.locals import *

pygame.init()
screen = pygame.display.set_mode((400,300))
pygame.display.set_caption('Font')

WHITE = (255,255,255)
GREEN = (0, 255,0)
BLUE = (0,0,255)

fontObj = pygame.font.Font('freesansbold.ttf', 32)
textSurfaceObj = fontObj.render('Hello World!', True, GREEN, BLUE)
textRectObj = textSurfaceObj.get_rect()
textRectObj.center = (200,150)

while True:
    screen.fill(WHITE)
    screen.blit(textSurfaceObj, textRectObj)
    for event in pygame.event.get():
        if event.type == QUIT:
            pygame.quit()
            sys.exit()
    pygame.display.flip()
    pygame.display.update()